How about, uh, no more Motion control gimmicks? How 'bout that? Because that's all they are, a gimmick. Like the Nintendo Power Glove and the Sega Activator, just gimmicks. They are NO substitution for a normal controller or a keyboard & mouse.
The only good thing to emerge with Motion Controls is Nintendo's rejuvenated coffers because I firmly support them as the last purely Video Game Company making hardware. I don't care much for the Wii's main library, but I love to use it to play TurboGrafx-16, Commodore 64 and other classic games... and my Gamecube games since they load a little faster on it (because it has a little more RAM than the GCN).
Microsoft Wave and PlayStation Move though... please, no more. I hope they're massive bombs. I'd prefer to see Microsoft take another look at the first Xbox's game library and see what other good third-party titles they can get sequels made for... like Deathrow and Gladius.