<This> is what I've been waiting for.
"We are getting inside, and we are finding the secrets that have haunted us for so many years. This feeling is better than anything that has happened so far."
I hope it's not too late..
"Even though the two aren't in direct competition it's irresistible to compare. First, Gaikai games run in a browser while Online uses a stand-alone client. That means a Gaikai game can turn up anywhere, like in an ad or, as mentioned, on a Facebook page. Gaikai has a 'full screen' option but when I tried it I got a stretched letterbox version of the game that didn't look very good. Onlive scales to full screen nicely. Onlive supports a gamepad while the Dead Space 2 demo on Gaikai didn't (that could've been specific to the game though). In fact Onlive modifies games to support a gamepad even if they originally didn't. Both services start up a game quite quickly but Gaikai felt a little faster at getting you into the game (important if you're going to suck in players via an ad).
"The four building blocks of the universe are fire, water, gravel and vinyl." -- Dave Barry