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
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Engadget compares the controller of the Nintendo Wii with the Sony PlayStation controller: