At the time that I recieved it there was limited app support. What was more curious Chromecast app wasn't support on my Wife's Samsung Galaxy Tab 2 10.1. And yet it was on my Droid X2, yes I still have my X2. Yeah, I've had it a while now. Not sure what I want for an upgrade though.
Anyway, if you're thinking about getting one of these devices be forewarned not that many apps support it. Not only that most of the newer TV's have all the app support they need. There are other devices that would fit the bill better than Chromecast. Like maybe the Apple TV device, Roku or Slingbox, etc....... I'm sure I could spend all night point out other devices with similar capability.