Honestly this game looked great, but the gameplay was terrible, at least as far as the demo was concerned. You can't judge a whole game based on the demo, but... it seems so canned as to be nothing more than an interactive movie with simplistic fighting.
I don't think this is going to go over very well, and frankly, I don't think people expected this game to be a serious hitter for the X360, either.
All the 360 really has exclusively this year, thusfar, are Halo Wars and Halo: ODST. Everything else is either minor, has sputtered (like SO4, and like Ninja Blade will, I would be willing to wager), or isn't coming until 2010 (like Gears 3 and Lionhead's next project).