The latest version of Google Earth 4.3 brings a lot of interface changes and new features. There's a redesigned and improved navigation control that lets you change the perspective much faster.
Check this cool screenshot,
Google Earth 4.3 can be downloaded from earth.google.com Windows users that don't want to install the application using Google Updater can try this direct link. You'll probably notice that the Windows setup is much smaller: the size has been reduced from 12.7 MB to 7.36 MB. Unfortunately, the new version seems to be less stable and it uses more resources, but it's still in beta.
check this cool video,
more information at Google system blog