MS is probably giving them all a really sweet exclusive kind of deal for their Natal project, basically the old moneyhat thing, I mean, why would these japanese companies do this otherwise, MS is last place in japan. Why would these companies be so eager to develop for a last place console, and come out praising MS as if bill gates gave them favors and anybody reading this knows what kind of favors i'm talking about heh. But, MS is fooling both themselves and us if they think that this is going to be anything of a game changer in the marketplace. It's going to run costs up too much if it's included in every 360, and if it isnt it won't be more than a blip in the events of the generation.
Eventually, I think that all 3 will have a wand kind of motion control, as the other two will, its motion control would be cheaper than the natal technology, and MS would like to be able to play games that have came out on the other two.