The direction they took on the look of it. People may not like it because its too "spacey" but its set in the future. And the demo took place on an alien world, right? We are and always have dealt with alien lifeforms in the Halo univ. The game play in terms of co-op (big fan of campaign co-ops). Reviving teamates. The mechanics seemed cool. Jump/boosting across platforms AND climbing ledges. I think we're going to have a solid game there.