Have you ever wondered how would it be to play Wii in Space? Without gravity? I personally think it's not really possible. The sensors in the Wii-mote sense all kinds of forces that affect it, so it also measures the Earth gravity to know if it's going up or down. Now, without gravity it would think that the Wii-mote goes constantly up, because on Earth the up-movement would "negate" the gravity. So in the end it wouldn't be possible to play most of the games (if not even all of them) when being beyond Earth or on another planet. Are my theories right? What do You think of it?