Google has unveiled Chromecast, a 2-inch HDMI dongle that allows you to stream videos, music, and photos to your TV. All you have to do is plug the Chromecast into your TV, plug in a USB power cable, and then you can "cast" content from your smartphone, tablet, laptop, or PC to your TV. The best bit, though, is the cost: Just $35 (yes, it's only available in the US for now), and you get three months Netflix free, too. In one fell swoop, Google has suddenly become relevant in the living room.