I don't see any reason why Nintendo should have made a console on par with PS4/XBO without any gimmicks. Why would anyone buy a NX over a PS4/XBO when the PS4/XBO already has a library of 3+ years built up for the same price? The other consoles would be an obvious choice for the consumer. On top of that, the NX would have just been overpowered by the Neo/Scorpio anyways. Nintendo is 3 years too late to compete.
This is a far better opition. It would basically have double the output of the 3DS or Wii U. While I'm worried about western 3rd party support, I feel like Japanese devs will be quick to jump on to NX so the can capitalize on the handheld market. If this is somewhere between Wii U and Xbox One in power, I can see Japanese 3rd parties doing PS4/NX multiplats to get the handheld market. If NX gets Pokemon, Yokai, Monster Hunter, and Animal Crossing (and I don't see why it wouldn't) those alone will give it a solid userbase in Japan that would entice Japanese devs.
It would be alot harder to get western third parties on board though, in which case Nintendo would have to sell NX in the west on Japanese 3rd parties and first party stuff alone, which I think could do respectible, of not mindblowing, numbers.
The thing it comes down to, I think, is price. $200 would be the sweet spot, $250 max. I'm not sure Nintendo could do that without taking a hit though.