M$ has alot of core exclusives coming as well.
They just went for the casual gamer this E3. They didnt have time to show their others.
As a Hardcore gamer it's easy to see why M$ had a poor conference. But from a business perspective ( which was there aim this E3 ) they had to sell Kinect to the casuals. Thats what they did. The games may appear kiddy, and casual crap to us. But the reality is they nailed the right games for Kinect to succeed. They want a piece of Wii's pie.
Dont forget core wise M$ has
Gears 3
Halo Reach
Fable 3
Crackdown 2
Forza challenge
Cryteks Kingdoms
Exclusive timed on COD DLC for 3 years.
Decco
And that was in the conference.
There is more on top. At the show, but not in the conference.