I have a Panasonic Veira TV, Tivo, and Xbox, Roku, and just plugged in a ChromeCast I got for free. I am wondering if there is much that the ChromeCast can do that my TV and other devices could not already do. They all seem to do Netflix, Pandora, Spotify, YouTube, and Media Centers and the Roku has it's channels. What makes the Chromecast "special".