Sony’s show was mostly dominated by sequels that were already well-known or expected (Resistance 2, GoW 3, Ratchet & Clank). Otherwise:

Riddick: Also a sequel, but a bit of an unexpected one since the original was an older PC/Xbox game. It was a good one though, so there’s promise here.

Little Big Planet: Yeah, it looks cute and fun. It did at last year’s E3, too…

Flower: Another abstract flOw-ish pseudo-game that’s going to be hard to predict.

GTTV: Eh, I already watch enough racing on regular TV.

MAG: Now this is a bit more intriguing, as a Battlefield-style game hasn’t really been done on this scale (256 players) yet, just in MMOs like Planetside and WW2OL. It’s still really, really early and there’s little other information, though.

Overall, there wasn’t really enough new and exciting things though; it was mainly just confirmation of things people were already suspecting. All three presentations turned out to be rather underwhelming, in their own ways.