2DS didn't cause sales to explode in North America, I don't honestly know if there's a ton of appeal for the New 3DS over here. I think it will do quite well in Japan though. But primarily at this point though as others have mentioned I have to wonder if Nintendo is basically just selling different models of the 3DS to people who already own a 3DS. 

Well 2DS was never intended to make sales explode... New 3DS is intended to make sales explode...

Because its an upgrade and has bigger potential due to new features... eg more competitive.

ya they probably wont cut the price which is why were seeing so many limited editions and free game promotions. but like i said in my other comment, im not too concerned considering 3DS hasnt had any meaningful software in about 3 months.

gba sold better than ds in ist first month? didnt know that

It's had poor sales relatively for a while now though. Even going back to last year, the holiday season was dissapointing with Pokemon X/Y, Zelda: ALBW, and 2DS launch. 

This year is just even worse. The 3DS has more than enough software by now too to not need a new big game each month, the DS went periods of 3-4 months without a big release all the time (generally when Nintendo was focusing on the Wii) with no ill-effect. 

Door is closing on the handheld market. Unless Nintendo comes up with some really secret sauce, they should just focus their efforts on the next home console gen.

Just imagine if hit titles like Animal Crossing, Luigi's Mansion, and Fire Emblem were driving people to buy a home console they don't really want instead of a handheld console they don't really want.

2DS wasn't introduce to NA/EU to cause sales explosions, it was just a low barrier-to-entry 3D-free system that was, for them, absolutely dirt cheap to produce. More than likely, even its 99$ price tag is sold at around 2x profit as many of its pieces are very cheap to produce and it has no clamshell or hinges. It was a robust little system for kids or people who didn't want anything to do with the 3D or the ergonomics of the DS-line.  All things considered, its actually sold pretty decently as its neither an advertized mainline model nor is it sold in the biggest market. (This is like the GBA micro.) I suspect the 3DS will see a holiday price drop, they are probably looking at massive profitability on current sale-per-unit and can afford the hit.

I can see the n3DS (renamed, obviously) spir on some level of renewed interest, especially if it ships with the Xenoblade game pre-installed or ready for launch NA/EU. That game was and still is decently sought after by RPG fans, and having it available without having to pay 100$+ for the game in and of itself, is probably a nice perk. (The n3DS is definitely more aligned with eastern interest given what we've seen thus far, but there's also the fact that we have no idea what else is in the pipe works for the system.)

The 3DS, after this holiday, I would say has already saturated its nominal market of ~40-50 million market, but then we have to wonder... how large was the genuine market for the DS? I know I went through three DSs due to build issues and quality but have only had one 3DS. (Anecdotal.) All the same, I still expect it to finish around GBA standards unless it falls off a cliff.

I dont know if to laugh or cry... >_>  ;-<

I`ll trust you for the tech stuff, because i really have no clue about that! :D
I guess a 3D screen wouldn`t be needed. Nintendo would be the first to say it wouldn`t be good for kids and then it would be 3DS all over again.
And of course, Nintendo could get other consoles for the tablet VC, if you will.

It`s not just a question of going this way or that way. Fusion strategy or tablet strategy.
I believe there`s a market for both things. Not to mention that in terms of games, Nintendo would take a step back in terms of what HW would allow them to do or how big could their games get. As far as i know, tablets don`t really have GBs and GBs of space to handle several games. Consoles can handle it because you can get the games in a store or have a external disk next to your console.

In terms of timing... i really don´t have a good idea on what the best time, but releasing every piece of hardware at the same time (specially the consoles) would be a way to push people to adopt more than one or at least, even in regards to marketing, would be best to show the exosystem right at the start.

Nintendo are compression masters. Their mainline games run in the single digits for GBs. Build the tablet with a MicroSD slot, and you're golden for space issues (most developers don't bother compressing their games well if at all... Naughty Dog... >.>). In fact, it'd be a good marketting tool too because so many manufacturers cut out the MicroSD slot to force use of tools like Cloud or simply to incentivize people buying the next "bigger thing" once they start running out of room.

It's a dirt cheap little piece of technology too...