Yeah, I seen this awhile ago, and I just got a beta key about a week ago, I am considering testing it out, but it sounds pretty sweet.
http://www.gamefly.com/download-games/beta/By my understanding, now for you PC exclusive people, you can finally play games that have been limited to consoles. Not completely sure if that's accurate, Nor am I sure on how this system is going to work, but it sounds pretty sweet nonetheless. It'd be even sweeter, if you could get achievements (for Xbox) and trophies (for PS3) unlocked in games you play in it on your actual gamer tag. Maybe something they'll find a way to implement later, if they can get Sony and Microsoft to go for it.
Edit: I've been looking at the beta and it seems like you can manage your game Q and rent games and shit through it, but since it's beta, I am still unable to tell if you can play console exclusive games on PC. The video makes it sound that way, anyway: "All Titles, All Platforms, All Access, Available Instantly on your PC or Mac."
Edit: I have an extra beta key if anyone's interested, send me a PM.
