What it does: Allows you to use a picture taken on your mobile phone as a search query.
Why it's cool: For the same reason Shazam (the iPhone app that tells you what song is playing) is cool. When you see something interesting, you don't always know what words to use for a relevant search. Goggles lets you snap a picture of the Golden Gate Bridge (for example) and instantly access history, weather, nearby locales, and more. (Note: this feature is totally different from Gmail's Goggles, which requires you to do simple math to protect you from sending drunken e-mails.)