Lots of Google properties have their own labs, like Gmail. Now, the Google Toolbar is getting its own set of labs. Right now, there are two labs. The toolbar is location aware. Google Maps will automatically fill in your current location via Wi-Fi access points. The “My Location” lab only works in the U.S.
A more international lab is available in the “Google Simplified Chinese Toolbar.” The UI has been changed so there is a better use of space.
The labs only work in Internet Explorer 6.0+ so everyone else can just enjoy a toolbar-free existence.
Read: [Official Google Blog]
Google earth is one of the best feature of Microsoft and now Google provide all lab feature in one tab it really great thing to watch and operate.