We're already in an age where smartphones will allow games to be played on the go and on your TV. Right now that's Angry Birds and Real Racing 3 but as Smartphones/tablets become more powerful so will the games.
Considering Nintendo's (non-core) group is more casual this is their competition more immediately than Sony's/MS. To that end, I don't see them having any other choice but to follow this trend, in fact WiiU should have been there already and is a horrible missed opportunity to lead the charge instead of following years later.
How well it'll sell will depend on a lot of variables that we could only wildly speculate at now. However, combining their game development resources would help avoid these momentum crushing gaps that GC/Wii/3DS/WiiU have all suffered with.
If it's out in 4-5 years and they can make an underpowered PS4 that goes anywhere and plays on basically any screen (gamepad/tv/tablet/PC) that gets all the PS4/720 ports and the full bore of Nintendo's games for $299 (possible in 4 years) it could be a hit.







