I'm a little late, but I can't watch G4 in my room and the live feed wasn't working for me so I couldn't comment whilst watching.
I only barely caught the EA one and missed Microsoft altogether, but from what I hear it was disappointing.
Super psyched for the new Medal of Honor. It looked amazing. Way better than COD (didn't see the Black OPs though.)
Crysis 2. Damn. Too bad my computer is complete ****.
Bulletstorm looked pretty fast paced and extremely fun. Loved the part where he pulled an enemy towards him, and then kicked the enemy in the electrical thing.
Madden...meh. Not a sports fan.
That EA Live thing (they showed it off with the MMA game, don't remember what it was called) sounded awesome. I'm not big into sports games, but thousands of people watching me fight some other dude sounds pretty cool.
I'm not a huge fan of Star Wars, but that little trailer was pretty epic.
Didn't see Dead Space 2, but they showed a little as the G4 guys were going over it and it looked fine. Never played the first one.
I'm currently waiting for the Ubisoft stream on Gamespot. Really looking forward to Assassin's Creed Brotherhood. Haven't heard what other games are being showed, but I like surprises