Also, Master Chief was in the demo; the original poster (and perhaps you) was just too blinded by seeing something open source on the screen to notice it.
MSR is one of the few branches of Microsoft that doesn't feel like traditional Microsoft. But by all means, continue hating every little thing that has to do with Microsoft.
Yeah, you're right. I noticed the shard gun after posting. Microsoft research does amazing things, but it's still surprising to see a game named after, and starring, the Linux Mascot on Microsoft's official videos.