In order to save the mods some head aches I'll start a general purpose E3 so people wont make a million threads talking about the same thing.
OT: MS leaked it's own keynote on their own website.
http://www.joystiq.com/
TL;DR:
Halo 4
Halo:CE HD remake
Kinect Starwars game
"Kinect Fun Labs" ?
Ryse: A Kinect action game (lets see how well that works out)