Watching the conference, I don't know, but moving the PS3 controller looks really dumb.
Maybe because it hasn't changed much from the PSX/PS2 Dual Shock, it just looks like someone doing the whole silly "moving the controller" thing that a lot of people naturally do. But the Wii controller is more naturally made for moving and pointing with. I could see the PS3's motion thing only good for tilting and flying. It wouldn't work at all for two-handed games (boxing, drumming), one-handed games (conducting), sports games (holding it like a bat, club, stick, etc.) or FPSes (it doesn't feel like a gun). Maybe they'll have a racing game on the PS3 where it works like a steering wheel (like a version of "Riiiiiidge Raaaacer", perhaps), but that's about all you can really do effectively with a motion-sensitive controller where you need to have two hands laterally on it.