I kept a list so I could remember what was announced. I'll post it here too in case someone finds it useful.
The Beatles Rock Band
Release date 9/9/09
A creepy guy in a red jacket plays drums.
All You Need is Love exclusive to Xbox Live. Proceeds go to charity.
Tony Hawk Ride
Modern Warfare 2
Release date 11/10/09
Snow level demo complete with snowmobile gameplay
Timed exclusive map packs
Final Fantasy XIII
Spring 2010 release
Shadow Complex
2D side-scrolling Xbox Live Arcade title.
Joy Ride
Avatar racing Xbox Live Arcade title. Free to download and play. Cosmetic upgrades to care available for purchase.
Crackdown 2
Only a trailer shown.
Left 4 Dead 2
Trailer in New Orleans
Release Date November 17
Splinter Cell Conviction
Demo shown
Release this Fall
Forza 3
Trumpeted as the definitive racing game of this generation
Released in October
400 cars. A lot of car customization
Halo 3 ODST
Set weeks before the start of Halo 3
Play as multiple ODST shock troopers to piece together the story.
Release Date September 22
Halo Reach
"Falls" 2010
Multiplayer Beta with ODST
Alan Wake
Demo shown
Release Date Spring 2010
Music on Xbox Live
Partnership with Last.fm.
Free for Gold members.
Netflix
Add movies to queue from Xbox 360.
Partnership with Sky to deliver tv to UK members.
Zune Video Store on Xbox Live
1080P
Every movie instantly. No downloads. 18 countries.
Live Party
Watch movies and tv with Live friends using Avatars
Facebook and Twitter
Facebook and Xbox Live friends can be viewed at the same time.
CUBBY THE DOG
Post screenshots to your Facebook
Metal Gear Solid: Rising
Raiden game
Camera Controller- Project Natal
Steven Spielberg likes it
Facial Recognition
Full body motion capture
Navigation with hand movements.
Body Breakout game
Knock at Nintendo- "this isn't the kind of game where you sit on the couch using pre-set waggle controls."
Paint Party- throwing paint.
Milo- Molyneux's game. Play with a little boy.
What I'm interested in: Crackdown 2, Splinter Cell: Conviction, Halo, Alan Wake, MGS: Rising
I'm completely uninterested in Project Natal and Milo. The games they showed with it all looked pretty gimmicky.
Overall, a pretty good press conference, but I don't think it's anything Sony or even Nintendo can't outdo. I was hoping for another Duffy song this year though :(