With a name like Chromecast, you would be right to assume that the new device from Google is based on Chrome rather than Android, but according to GTV Hacker, that isn't actually correct. Not only is the new Chromecast more Android than Chrome, it's already been rooted, just like most other Android devices on the market...
Source: http://www.phonearena.com/news/Chromecast-is-Android-based-already-rooted_id45796
Source: http://www.phonearena.com/news/Chromecast-is-Android-based-already-rooted_id45796