So I have heard about this new potential game system named OnLive. It's designed to download the video games from any game from all these game consoles: Microsoft's YAOI-arousing game systems, Sony's awesome game systems, and Nintendo's all-top game consoles.
However, you can't download any online multiplayer games like Super Smash Bros Brawl of Nintendo Wii or Halo 3 of XGay 360.