Google TV box aka Logitech Revue, basically it turns any tv into a "smart" tv. It figures out what's on tv and makes all kinds of recommendations by category, lets you search (comes with a really sweet keyboard with trackpad) for stuff, surf the intarweb, play pandora, etc. You can watch youtube, netflix, stream from your home pc and other stuff. Will run some apps and play games too.
Works with any hdmi tv and has built-in wifi or wired connectivity.
These originally went for $229, they dropped them to $100 a while back. Most ebay auctions are going for $70-90...yours for $50.