Sony has probably a little bit better lineup than MS so the new control systems gonna decide whos going to win
I think it was a bad move to push the release of the PSmotion controller (probably) closer to the release of Natal
I think it will take a lot more for sony to create the impression "I WANT THAT" in peoples minds than it will be for MS with Natal
as things are now, with no real games announced for natal and sonys arc, Natal also has the hype on his side.