I got to play Killzone 3 and GT5 in 3D (and got a go on Move) a couple of weeks back at Sony's first Beta Rooms event. Unfortunately WipEout HD wasn't there though.

I thought GT5 was a bit underwhelming to be honest and the depth didn't help me judge corners any better. I thought it made more of a difference on Killzone 3 where it definitely made it easier to judge the landing spots when you were leaping about with the jetpack. There's a lot more going on on screen too and the 3D did make it feel more immersive (I tried the same level in both 2D and 3D for comparison).

Neither convinced me that it's worth the expense of all the kit and having to wear a pair of goggles all the time though.