Release Date: 2007
We all hoped to get a glimpse of what is almost guaranteed to be the biggest game in the 360's sack of awesomeness, and we only got just that. Still, witnessing Master Chief in his hyper-detailed, hi-def glory was a complete show-stopper (literally, as it came at the conclusion of the Microsoft press conference).
Now, our desire to blast the Covenant off of the Earth is the thing we look forward to the most in 2007. We'll be nipping at Microsoft until they cough up more details on the 360's Optimus Prime of library additions.
For more on Halo 3, gohere.