Whether you're running iOS, Android, or a PC, as long as you're running the Chrome browser it will let you stream contect. It's being positioned as an affordable solution to viewing your mobile content on TV sets.
Our favourite feature is definitely the Chrome projection which (Although only in beta stage) will stream content playing on your device from Chrome to your TV. This is useful for those sites that aren't signed up to the Chromecast revolution and means that you can watch content on sites like iPlayer and Vimeo plus stream things like internet radio.
As for streaming from your Apps, there is currently a group of the usual suspects that you can stream from such as; Youtube, Google Movies, Google Play, Netflix.
Though this is only currently available in the USA, we're expecting it to land on UK shores very soon! View Google's video below for more info.
https://www.youtube.com/watch?feature=player_embedded&v=cKG5HDyTW8o
Source: http://www.google.com/intl/en/chrome/devices/chromecast/#netflix