Bulletstorm
Based on the demo, I described Bulletstorm to a co-worker as "MadWorld with guns." (It doesn't hurt that their protagonists have the same voice.) At any rate, it's hard to describe the feeling you get when you kick an enemy into the air, then shoot him in the junk, with a trajectory that finally lands him on a bed of spikes.
If there's a substantial campaign to go along with the kill-scoring system, this could be a real winner.
Progress: Gave Up -- Played the demo