Big Three E3 Predictions

Microsoft:
New Gears of War.
Halo 4 details.
Call of Duty DLC exclusive.
Kinect stuff? Hopefully a new IP.
Microsoft is usually boring unless debuting new hardware, so I don't expect much.

Sony:
Vita price drop to $200, I expect them to lead the show with this and some apology.
Call of Duty Vita
Bioshock Vita
Battle Royale/LBP Karting/Last of Us for Vita
More HD collections, PSOne and PS2 Classics coming to Vita.
Partnership with Onlive teased.
More details for Battle Royale, Last of Us, and The Last Guardian.

Nintendo:
$249/$299 Price for Wii-U
Bioshock Infinite, Skyrim, Battlefield 3, GTA V, more AAA titles for Wii-U.
Call of Duty Wii-U
Epic Games onstage demo of Unreal 4 for Wii-U
Majora's Mask 3D
Metroid 3DS/Wii-U
Origin/Nintendo Network Partnership
Gamecube games for 3DS w/Circle-Pad Pro.
Redesigned Circle-Pad Pro shipped with new 3DSs, ability to be Wii-U controller.