The PS3's 3D feature—upgradeable via a software update for every PS3 out there—is actually pretty decent. Not only did we see it live, working, on a giant projection screen, but on a smaller HDTV in front of us.
It's obvious from the 3D glasses we just got handed as we were entering, that Sony is going to be debuting a 3D system in a few minutes. You can watch that live.
Sony's going to be pushing 3D hard, starting right now. Every PS3 is going to get 3D capabilities through a system update.