The first finalized ability to mirror Android to your TV through the Google Chromecast is now available, thanks to Koushik Dutta. There is a catch though... you have to have a rooted Nexus 5 to do it right now. Koush recently updated his mirroring beta, but it is obviously still in its early phase of development. The main reason the Nexus 5 is currently necessary is because it's supposedly the only phone which includes a hardware vp8 encoder. Here's a quote with a few more details, For all of our Nexus 5 users with Chromecasts who decide to try this out... let us know how it goes!