NX I think might be trying to bring back the "arcade" appeal is gaming. Remember when you were a kid and going to arcade you could meet people and they'd gather around and play together.
Well in a modern context, imagine a small little portable device you can carry anywhere. When you play alone you can use the screen, but when people are around and want to play, it can project an image anywhere and the controllers detach so multiple people can join in and play.
People passing by will see what you're playing and want to join in too.
Add in some funky controller add-ons and hand gesture sensors on the side of the unit .... and voila ... Nintendo NX.
Nintendo's "answer" to anti-social gaming (ie: VR, playing alone in a basement, playing on your phone detached from everyone else).
The other thing is if you've ever been to Japan you'll be surprised to see that arcade gaming isn't just alive and well, it's huge. It's everywhere in Japan.
