I think this falls into the "PC is better than PS3" arguments.
Devil May Cry 4 is making its way to PC. Dont count any game on Xbox out. Dead or Alive is going to PC, Viva Pinata is going to PC, Lost Planet is going to PC, Halo was a Mac game but was bought by MS. With Windows Live they will put as many Xbox/360 games on PC as they want.
Then again, I can see how this would be hard to obtain since the 360 is "The most powerful console in the world." Right MS, right? Right? Ah, little nudge humor.