The good: The
Google Chromecast is a dirt-cheap wireless video dongle that streams Netflix, YouTube, Pandora, Google Music, Google Movies & TV, and HBO Go to your TV using Android or iOS tablets as remotes. Its small size hides neatly behind your TV and makes it easy to take with you when traveling.
The bad: The beta screen-mirroring feature won't work as well as you want it to, so you're largely limited to the supported apps. The lack of a dedicated remote also means you always need a smartphone or tablet nearby. And for $15 more, you can get a Roku box with many more channels and an onscreen interface for a more traditional TV experience.
The bottom line: Google's $35 Chromecast stick is a cheap and easy way to add streaming video and music to your TV, but it still isn't as fully featured as similarly priced Roku boxes.
I love my Roku box
http://reviews.cnet.com/google-chromecast/