Well, Fallout 3 (+ announcement of exclusive 360/PC DLC) demo looked great (not personally my sort of game but I could see why people would like it), Resident Evil 5 walkthrough, looked great, release date. The Gears 2 trailer imo was just awesome then CliffyB showing it off to me was really awesome. Fable 2 looked great and so on, I liked the fact that they showed third party stuff tbh, they showed what was coming for the platform even if it wasn't exclusive and it entertaining to watch, Jack Tretton talking a lot, isn't.
And XBLA stuff, Geo Wars 2, I LOVE Geo Wars, Galaga Legions, Banjo, Portal: Still alive and (coming much later) the announcement of South Park.
For me, the important bit was "Oh look, this is whats coming SOON" I mean, PSN has some good games on it, but how many times have we had release dates and have them slip massively? I can certainly see several of those games announced for PSN not coming out before the end of year whereas XBLA, yes titles do slip, im not stupid enough to say they don't but the news we're getting is that they're pretty close, Geo Wars 2 is August 6th, and the rest will follow soon.
I guess maybe my view of the conference comes from short term for Microsoft vs a bit more long term for Sony.
Oh and despite the fact that I won't be buying it and how embarrasing the show-off was, I thought "You're in the movie" looked pretty cool.