It makes total sense for the Japanese market. If someone said it wouldnt, then i wouldnt value their opinion much.
The Japanese carry their portables around and use them as their main gaming system. Having a home system is not handy for them because they cant make any progress with that that they can then take with them. This is perfect for them. For westerners, it isnt so hot though.
If you think about it, thats why ideas like transfarring come from japan. It makes sense to them. From a westerner point of view it would be comparable to beeing able to continue playing your home console games on your phone from anywhere. Except for us having something like a games console out in public is embarassing.