Well in 2009 they had Halo Wars, ODST and Forza 3.
Last year, Alan Wake, Crackdown 2, Fable III ( which isn't an exclusive anymore ) and Reach.
This year : nothing for the first six months, and Forza 4 / Gears 3 this fall with maybe a Halo CE remake.
For me their 2011 line-up looks just as bad as the last two years.
Plus they're focusing on Kinect right now, and people shouldn't expect anything from E3 except and Halo 4 announcement from 343 Industries.