So it seems everyone is talking about OnLive, a company that offers on-line on-demand video games. They did a presentation yesterday at the Game Developers Conference in San Francisco and indeed it seems impressive.
They claim all you need is a small 1Mg browser plugin and off you go play all the big titles. Your PC is not very powerful? No problem, they process the game frames on the server and stream them to you so you don’t have to render the fancy graphics.
On a similar note you might want check QuakeLive:
Impressive technology delivered through the web :)