I downloaded it on the Marketplace last night so I could watch it in 720p. Needless to say, it's beautiful. Too bad the actual game won't look quite that awesome. The most interesting things in the commercial are the shield grenade and the speed Master Chief runs. There was no mention of the grenade from Bungie thusfar, so I'm wondering if it'll be a special item available in the campaign, or is just for wow-effect in the commercial. Also, it's been rumored that the now-vacant "X" button will be used for a Sprint feature. It's pure speculation at this point, but after the plodding pace Halo is known for, a way to speed things up a bit would be fantastic. Of course, with the amount of customization they're offering in the new game (UT-esque, with modifications available to movement speed, gravity, etc.) it's not quite as big a deal.