First up...

+joyride new arcade game using your avatar in a new type of kart racing

+shadow complex arcade made by epic which is a side scrolling shooter w/ 10+ hrs of game play over 120 secret items/locations

On to a few new games on other platforms other than xbox...

+modern warfare 2, final fantasy 13 both spring 2010 release and tony hawk:ride which features a new skateboard type controller also rock band the Beatles w/ 1 exclusive track for xbox.

Now to the exclusive games for xbox ...

+crackdown 2 skills for kills!

+left 4 dead 2 which looks awesome.  If you didn't play the 1st I highly suggest looking into playing this game. Released 17 nov

+splinter cell:conviction, which is a lot more fast paced game which is a split of 007 and new Sam Fisher. I say 007 style because of the new gadgets.

+halo ODST - You will be playing as a few different ODST to piece together a new story. The old halo pistol is back now with zoom! When purchased u will get an invite to the newly announced Halo: Reach multiplayer beta

+Forza Motorsport 3 which claims to be this generation's greatest racing game, including a new art creation for the car's paint.  It's hard to explain but this new way to paint and design your car is really cool and the possibilities are endless with the amount for customization available.

+the long awaited Alan Wake. The game play that was shown looks amazing.

Also, big news...the metal gear solid franchise will be coming to the xbox featuring a new game called MGS:Rising in which you will be playing as Radian from other MGS games

New content for the xbox live dashboard

+Radio Station last.fm comes to the xbox.

+Live tv by sky

+As for movies, new way to watch with no disc and no downloads in full 1080p. You will be able to instantly watch movies with no waiting for the movie/ tv show to download.

+Live party which lets you watch tv, movies and listen to music together with friends over xbox live

+Social networking. You will now be able to access facebook and twitter via your xbox. A few things you'll be able to do is check friends, view pics and update your status, also including taking screenshots of games and posting them.

now for the biggest news:

Xbox is taking gaming far beyond the next level and setting the bar for future gaming. Introducing codename Natal which is a new adapter that lets you play games and control your xbox without a controller. This full body, voice and facial recognition kit will revolutionize how we play games, using your whole body to play games. Walk in front of your xbox to turn in on and it will recognize who u are and sign you in. You will be able to fully control your avatar and the dashboard using your hand to scroll around and launch games. its really hard to explain how cool this looked and the few games they showed but it blew me away and my jaw hit the floor when they showed what will be possible to do when it is released... no release date yet.

Most of the videos are on the marketplace right now I suggest going there to see most of what i talked about above.

I'm sure I might have missed a couple things but this is most of what I remember/wrote down!looks like owning an xbox is really paying off !