I've tried 3D (55" Samsung) this christmas and I didn't come out very impressed, depth works, but still want to see how that can be used in software. For the PSP2 that both capacitive screens seem very interesting, the back one for innovating and the front one to compete with Apple (I'd expect some iOS games to appear on the platform).
On the software side, the 3DS wins, because I like more those kinds of games.
3DS: Professor Layton, Mario Kart, Pilotwings Resort, Resident Evil, Ghost Recon: Shadow Wars, Steel Diver, Animal Crossing, Dragon Quest, Ninja Gaiden
PSP2: Little Deviants, Smart As, Wipeout
It looks like the 3DS, even though I'm not impressed with 3D (need to see it in person).
Still going to wait till christmas so both have a chance.
