This is existing games and it sounds like it makes all games platform-agnostic (Xbox 360 game, PS3 game, PC game, Mac game, etc).At the last GDC the industry big brains were sat around telling us how games would one day be remotely rendered on big computing clusters and then streamed to our TVs. The big unveil at this year’s GDC has proved them to be correct. Maybe. OnLive is a service on which you use superfast broadband (1.5mbps minimum) to play games on a remote server. You just plug it in to any “entry level” PC or Mac, or hook it up to your TV, and play. It doesn’t matter if you don’t have the latest 3D card: because the remote server does the rendering and streams the result to you. That’s the theory anyway, and it’s a theory a bunch of big name publishers have signed up to.
It's explained much better in the video.