in the home console market? definitely, they would make a mint from their games still just have them sold on XBO/PS4/PC instead of their own console, given Wii U sales right now that would probably be a pretty effective move for them but I imagine they will stick with the Wii U for the short term, if it doesn't improve sales and falls way behind PS4/XBO before too long then it may well be something they think about for the next gen.
handheld market they would be insane to do it though, the 3DS has that cornered and they have the brand recognition and lack of competition to really hold that down for a long time yet, mobile gaming is on the up but it really can't compete for the quality of the games you can get on 3DS or handheld consoles, they should really just try to keep that market cornered, and then switch to 3rd party software for the home console market for the next gen there.
