Chromecast is a useful device - but it's oONLY a Streamer. Can't do anything else at all.
Doesn't do local Streaming - only works by sending the link you are looking at in uTube / netflix whatever to the streamer. Though if you can hook it into plex for the web then it's a great device for the money.
That's what's cool about it: you find a stream on your phone/tablet and then tell the Chromecast to start streaming from the internet. However, it does not have Airplay-like functionality as the article implies.