Yes, I Tried Trackmania 2 Canyon Demo at http://www.gaikai.co...yon#Client=true , and the sound, video, control, and gameplay is pretty good for a game which is being streamed to my Web Browser which is Google Chrome. There isn't any lag when I play this game in Windows 7, 1GB RAM, Onboard video card, Google Chrome with a Cable internet Connection.
I've tried it and it's pretty neat. But internet connection required is even higher than OnLive it seems although the performance seems better if you can meet the requirements.
I wish they did not use the Java plug-in, and used HTML5 which all newer browsers like Google Chrome, Firefox 11, IE 9, and Opera whiich all support HTML5 since Java seems to take longer to load then HTML5 and Flash Apps.
I think most people with decent Cable, DSL, aDSL, Fibre, and other high speed connections could use Gaikai since my Cable Internet speeds are not super fast, and can run both Onlive and Gaikai pretty good.
Well my home computer can do that as well. But at my school computer, which reaches download speed of over 70mb/s on speedtest.net, gaikai doesn't work. I guess it has something to do with permissions.