Most likely below PS4 specs if it's setup like this:

base station $250

handheld $200

I guess ultimately $399 in America.

So once again people who don't care for a 2nd screen have to pay premium price.

And what evidence do you have for this? At this point in the timeline, it's REALLY hard to keep secrets in the semiconductor industry because so much is involved in contracts, fabs, etc. All indications are that this is a Tegra system with a mobile focus. 

http://www.trustedreviews.com/news/nintendo-nx-release-date-rumours-news-and-specs

And then you have established markets in place where people are heavily invested in either Sony's or Microsoft's online infrastructure and ecosystems. Nintendo's market has been really tight in home consoles since the rapid decline of the Wii post-2010. How on earth would they expect to sell a system at $449 unless they were going to be in the vein of PS4 Pro / Scorpio performance AND 3rd party support?

It just doesn't make any sense.

Do you have ANY evidence that this price is accurate? Because we have TONS of examples of 'placeholder' pricing going back generations, but no evidence AFAIK that NX is going to be a powerful system that will sell for a notable premium in the face of $299 PS4s/X1S, and $399 PS4P. 

I mean, maybe you mean the gimmick portion of NX will make it expensive like WiiU was? If anything, that's worse IMHO. WiiU at $199 on launch without a tablet would probably have sold much better than it did at $349. Disastrous mistake. At $449 if it's another weak console with some gimmick hardware, it's going to bomb like something we haven't seen since the 32X. At that price it needs very high performance and full support by EA/Activision/Ubisoft/etc.

For all we know, $399 could be for the SKU that includes both the console and the rumored tablet. The lack of information and the abundance of rumors is getting out of hand, I mean no one really knows what the NX is going to offer.

Well, the bottom line for the vast majority of people is :

Where are the games?

How good will it play those games?

With the WiiU, the multiplats basically were nonexistent. Some minor early support, but that rapidly evaporated. First party wise I'd rate their exclusives pretty highly, but it took ages to get some of them out, and some never did materialize even to this day (mainline Zelda, a new Metroid, a new F-Zero). I'm not picking on them too much, because even wonderful titles like Donkey Kong Tropical Freeze underperformed in sales, and honestly Metroid and F Zero wouldn't have lit up the charts either.

So it played 1st party Nintendo titles fine, multiplats were rare, and the system was outclassed on multiplats by the PS4/X1. For $349.

What did the $349 get you? A goofy tablet thing that was poorly supported at best. A lot of times, just like with motion controls, the usage of it felt forced and unnecessary, where you'd rather just use the pro controller.

Forcing people to buy an expensive initial package to get something they don't necessarily want is a bad strategy. You can solve that later on by dropping the price substantially, but it may be too late in some cases. A faster solution is to just drop whatever is causing the price to be overextended and go from there.

Some examples are the PS3 and $599. It was incredibly aggressive in terms of packing in the very expensive BluRay tech, if it had been a DVD-based system it could have launched maybe at $399 for the 20GB model. That would have gone over a lot better. At least Sony had a good reason to push for that, as it arguably helped establish BD as the winner in the format war over HD-DVD, but at the cost of marketshare in consoles. Gen7 would have been interesting with PS3 starting at $399 and dropping price to $299 before long.

Also think of X1 and Kinect, $499. For the people that wanted Kinect, great, but to force everyone to pay $500 and get that packed in was a bad move. Sales quickly faded and even after claiming that kinect was inextricable to the Xbox One, they did end up pulling it of course and dropping the price. I know that SO MANY people clained that it wasn't a price drop, but to the consumer with a limited budget, that's exactly what it is.

FACT : if a gamer wanted the Xbox One to play games, and didn't care about Kinect, then being able to buy a kinectless model for $50 or $100 less WAS a $50-$100 price cut to the cost of entry, and that was a BIG deal.

That brings us full circle to WiiU, the tablet, and whatever NX is. I wouldn't have missed the tablet for a second if it never existed. All of the best games would have been absolutely fine with the pro controller and/or Wiimotes. $199 for a Nintendo system (preferably with a better name haha) and all of the same games would have sold far better. Like Microsoft and the Kinect2, Nintendo could never really market or make the tablet seem like a worthwhile reason to have a system cost so much more than it otherwise could have.

If NX is a sub-PS4/X1 system for $199/$249 with great nintendo exclusives, it will be a hit to some extent, maybe even a big one if marketed right. Starting out with a new mainline Zelda could really do wonders. 

If NX is a sub-PS4/X1 system for $399+ with some gimmicky thing that isn't necessary for the fun games (in more than a forced way), then good luck, this might be the last Nintendo system period.

People dont buy a console, to have it drive them around, or make them dinner.

So those would be features that would drive the cost of the console up, while in no way enhanceing your gameing experiance.

Graphics atleast enhance the gameing experiance in some form.

Sony learnt that the hardway last gen. So this gen they are so focused on gameing, their willing to cut even minor price increases in hardware, that arnt nessary for gameing. It leaves you with a peice of very capable hardware for the cost of it (perf/$) which is something the general public responds well too. In general mass consumers love getting alot of bang-for-buck when they buy things.