What is Google TV?
Google TV is an open platform for TV-related devices that brings together the best of TV and the best of the web to deliver the premier entertainment experience for the living room. It is built on Android and runs the Google Chrome web browser.
Google launched the Google TV site, even before the Google TV start working.
Google TV will allow you to
Search from the TV
Add Applications to your TV (just like mobile apps).
Use Mobile as Remote control
Google TV uses Android, chrome and adobe flash player.
Read more here on Google TV website