With tons of speculation and opinions about the currently rumored form of the NX flying around, I thought we collect the biggest up- and downsides of it.
First, if you havent noticed yet, I'm putting emphasis on the word "rumor"! Whatever we have heard, for now its nothing but that, even if more than one website said the same thing! (remember the controller-leak guys!)

So, IF the NX turns out to be EXACTLY what the current rumors are saying (High-Power Handheld with Tegra chipset, that can connect to the TV and has detachable controllers), what are its biggest Pros and Cons? No need to list everything, just what comes to mind and hasnt been mentioned yet!

Here are mine:

Pro: Take all your games with you!
Im already a huge fan of Wii U Remote play, and, considering my daily 1.5 hours train commute have abused my 3DS nearly to death. Being able to play ALL of the games EVERYWHERE would be awesome!

Con: Powerful enough for Third Party?
While the system will likely be stronger than the Wii U, XB1 and PS4 are probably out of reach for a mobile Tegra chip. I was really hoping Ninteno didnt give up on Third party alltogether, but if those rumors are true, the possibility exists that Third parties are going to ignore NX simply for its lack of power.

Those are my biggest Issues about the currently rumored NX, what are yours?

Pro's:
pretty powerfull tablet by todays standards (would be high end in performance for a few years)
unified games library (if its one system that acts as two).
Its a handheld and can play games on a home tv.
if its a Arm based tablet, maybe you could run native arm based apps on it? if nintendo allowed it.

con's:
its too weak for 3rd party (differnt cpu arch, differnt gpu arch, 1/3 the power of a PS4 = too much hassel)
the Tegra NX is powerhungry, to reach 1/3 of a PS4's power, it uses 20watts+, which is alot for a handheld chip.
its a tablet... that means you cant fold it and carry it in your pocket. it will require you to carry a backpack for it.

The main pro if this rumour is true is that the console could well end up being the successor to Wii U, 3DS and Vita (since Sony don't appear to care about handheld anymore) all rolled into one. Which means it would completely own the Japanese market and in addition to having all of Nintendo's releases on a single console, it would probably get the bulk of support from Japanese publishers (Namco, Capcom, Atlus, Square Enix).

The main con is that Western publishers (with the possible exception of Ubisoft for one or two things) would still snub it. That's not much of a con to me personally as I loathe most Western publishers, but I know a lot of people care about it.

It's going to get the same type of 3rd party support as the 3DS, which is totally OK! 

Pros:
-Biggest is definitely unified game library, that means whole support from Nintendo without dividing support for separate handheld and home console like before. In theory imagine all Nintendo 3DS and Wii U games on single device. So great support without droughts.
-You can play at home at TV, or you can play on handheld and take it with you.
-Pretty powerful handheld.
-Hybrid means that NX will have at least lotsa Japanese 3rd party support that usually release some games only on handheld. 3DS has good Japanese 3rd party suport, Wii U doesnt have at all.

Cons:
-Power not on pair with PS4/XB1 and different architecture, that means 3rd party ports want be ease like PS4/XB1 ports.

Totally agree, people are not aware of this, 3DS and Vita have weak West 3rd party support, but they have very strong support of Japanese 3rd party, fact that NX is handheld that can be used like home console and that is basic successor to 3DS and Vita, means at least great Japanese 3rd support.

Expect mobile games such as Crossy Road and Dumb Ways to Die on this thing.

PRO
1. As mentioned before, the biggest pro is 3rd party support from japan. Project x-zone, bravely default, shin megami tensei, monster hunter, etc... Expect games like this on the console.
2. If BOTW on the wii-u looks at least as good on the nx then we have the nicest graphics ever seen on a handheld, to the point that i might not care it's a handheld hooked up to a tv.
3. I take number 1 back, THIS is the biggest pro. Unified nintendo library. No longer will i long for the days that kid icarus or luigis mansion or mario 3dland  be on a home console. 3rd parties could completely abandon this machine and, theoretically, we would still see a steady flow of games.
4. possible pricepoint of games: A new 3ds game is usually $40. If nx games are even $50 it would be worth celebrating. no see the number 4 con
CON
1. Crushed are the dreams that i can just buy one console to have all my favorite titles. No way in HELL multiplats are coming to this.
2. If we havn't seen things like party chats and industry standard online interactions on nintendo's home consoles by now there's no way there going to start with a handheld.
3. Nintendo handhelds are marketing more to kids than their home consoles are. I'm a little afraid of an overflow of titles like "Nintendogs", "imagin: style savyy" or just a barage of 2d styled games that are going to alienate me from the console. Need more metroid primes, 3d zeldas, 3d marios, splatoons, bravely defaults(2d i know), luigis mansions, and some new 3d designed, imagintive m-rated games (more like dishonored or dark souls, less like COD) on the console.
4. Pricepoint; Are we getting a handheld successor but paying for home console games? Will the new 2d kirby game cost us $60??? Will the price point at least vary on a large degree or are we going to be paying ps4 prices for 3ds games?

Pros/cons have been state above but I'll just list the biggest con

- Who's going to buy a Nintendo "brother" console to a portable? The DS, 3DS, and GBA all outsold their console counterparts but huge margins, now imagine the DS/3DS/GBA were all powerful enough to actually handle Wii/Wii U/GCN ports in their day reasonably well and could play all the same games. The console sales would be even lower. Even if the console has "better graphics", that's about the only thing it'll have.

IMO a Nintendo "console" in this setup would sell about Wii U levels.

My personal feeling is Nintendo needs to may hay with this portable console setup, it's unique, BUT they need to still give it enough power to credibly be a console.

To that end, I think they should put a very, very high end mobile chip into the chasis. Mobile chips, even the highest end ones are tiny anyway, so that's not an issue. I'm talking a chip that's like 800 GFLOP-1 TFLOP+.

PowerVR already has one called the GT7900 which they were hoping to find a vendor for in a "cheap" micro-console. Nvidia has the Tegra line. The problem with this stuff is its wonderful technology, but no one really needs that much power from a mobile chip, so no one uses this tech. But that's why Nintendo will be able to score this type of chip for cheap because they have great bargaining position.

Now of course that chip can't run at full tilt in battery/portable mode, so it downclocks/shuts down cores automatically when it senses it is in "battery mode".

The system will ship with a "base unit/home dock" which basically just houses a fan (and maybe a bay for a HDD). In "docked mode" the base unit/dock doesn't actually give the NX any extra power, it just provides active cooling for the NX unit so it can now unlock all its cores and run at full speed for TV play.

So voila. 350-400 GFLOP for "portable" mode, 800 GF-1 TFLOP for "home mode". One device. Simple.

This is not just handheld, it has base unit and it will be home console in same time, so you have handheld and home console in NX, so its not fair to call it just handheld.

Personaly I expecting price range betwine $40-60, $40 for games like Mario Tennis, Toad's Treasure Tracker...and $60 for 3D Zelda, 3D Mario, Mario Kart...similar to Wii U pricing. Also this will be NX games not 3DS games.

You realise NX will aim at home console and handheld market in same time, with basicly all Nintendo software on it and with most likly all Japanese 3rd party also on it. So NX will be handheld/home console with Pokemon, Animal Crossing, Monster Hunter, Bravely Default, Yokai Watch, Dragon Quest...3D Mario, 3D Zelda, Mario Kart, Smash Bros, SPlatoon, new Retro game, most likly will have afordible price (expecting around $250), and you expecting Wii U levels of sales!? Most likely only in Japan NX will have Wii U level of sales.