"I think they may be experimenting with a Natal-like camera *in conjunction* with a new kind of Wiimote, and maybe one other new addition for good measure."
No. Nintendo does not copy the other guys unless there is a strong trend. NATAL isn't even released so there is no reason to copy it.
A flashy-first game is awesome when it comes out. A great-first game is awesome forever.
Plus, just for the hell of it: Kelly Brook at the 2008 BAFTAs