Youtube launched a optimized web interface to watch Youtube videos in full-screen mode on the Sony PS3 and the Nintendo Wii. Why the Xbox 360 is not supported is a bit strange. I do not think there is a technical reason. The Youtube TV service is still in beta so I suppose they will add Xbox 360 later.

The Youtube TV Website offers a dynamic, lean-back, 10-foot television viewing experience through a streamlined interface that enables you to discover, watch and share YouTube videos on any TV screen with just a few quick clicks of your remote control. With enlarged text and simplified navigation, it makes watching YouTube on your TV as easy and intuitive as possible. Optional auto-play capability enables users to view related videos sequentially, emulating a traditional television experience. The TV Website is available internationally across 22 geographies and in over 12 languages. To access the new Youtube page you have to access the following URL from your PS3 or Wii: www.youtube.com/tv. Via the Youtube blog. Watch below a video showing Youtube TV in action on the PS3 courtesy of the Sony Playstation blog.

This new Youtube service comes just in time to watch the Super Bowl 2009 Commercials on the web after the air during the game, without having to leave the living room.