Dubbed the Chromecast, the 2-inch, black plastic dongle connects to a television set via the HDMI port to give access to all kinds of Internet stuff....
http://finance.yahoo.com/blogs/the-exchange/google-35-doohickey-puts-internet-tv-185815884.html
Read a bunch of people on G+ complaining about it. I guess it heats up a lot and isn't as easy to use as advertised. However, I might pick one up if they iron the bugs out. It's a great idea.