the same kind of thing happened with the DS, before software was seen and before you got your hands on it, it looks strange and you can't see the point, but once the software started coming out and people got hold of it, you get infected by the ability to control stuff ingame by touching it, its just not quite the same with a d-pad and buttons, the game changing according to your direction actions makes you feel a connection with it, makes you feel part of it and this is what the rev taps into. I think thats why dance mats, the eye toy, the konga's etc work well and sell well because of having something directly related to the game to control it with, hopefully rev will provide this connection between console and tv for all its games.
Sorry about the ramble, what do other people think?