The Microsoft booth will be packed with awesome stuff:
HALO 2
Forza Motorsport
Jade Empire
Fable
Kameo
Conker
Mechassault 2: Lone Wolf
Dungeon Siege 2
In addition to putting on a huge R6:Black Arrow tournament, Ubisoft will also be showing off some of it's big guns:
Ghost Recon 2
Myst 4: Revelations
Brothers in Arms
Splinter Cell 3: Chaos Theory
I have a feeling the NC Soft booth will be a popular destination seeing as they will have Guildwars for you.
WB/Monolith will be showing off a playable version of their upcoming MMO, The Matrix Online.
That's all in the Exhibition hall. We've got a console room, a LAN room, and a tabletop gaming room that will be equally packed with awesome shit to see and play. On top of all that we have a huge theatre which will host all our panels, movies and our giant geek rock concert.