Sony already has his wiimote, the SIXAXIS, and it has failed! I think that the xmote has been created for the 360's owners, but MS won't make new customers with that! This reminds me viva pinata in a certain way, this soft was made for young people, but it was a failure.
A great thing would be a kinda glove, fully sensored, like the one in minority report!
They have to find new things, not to copy!