Well, we should preface our thoughts by some interesting information we discovered talking to a lead developer at an unnamed publishing house: they discovered about the PS3 controller's motion sensing capabilities just a couple of weeks before E3, which is why we're not at all surprised there was only one motion-sensing capable playable on the floor, Warhawk. Does this last-minute decision point to indecisiveness or lack of direction in Sony's PlayStation group? Not necessarily, but you'd better believe it was a decision made in response to the capabilities of the Wiimote.You can read more over here.
Nintendo Wii vs Sony PS3 controller
Engadget compares the controller of the Nintendo Wii with the Sony PlayStation controller: