First people got a glimpse of the Earth via satellite at Google Earth. Then, people got a taste of the sky with an enhanced Google Earth interface and now users can take to the sky in a new flight simulator.
Users that wish to pilot a F16 Fighter or a SR22 four-seater while checking out Google Earth can do so by opening Google Sky and hitting Ctrl+Alt+A.
So if just another thing to do if you’re looking to waste some time messing around on your computer, only you get to feel like a real pilot. 
Bi-Tech
Google Adds Flight Simulator To Google Earth
First people got a glimpse of the Earth via satellite at Google Earth. Then, people got a taste of the sky with an enhanced Google Earth interface and now users can take to the sky in a new flight simulator.
Users that wish to pilot a F16 Fighter or a SR22 four-seater while checking out Google Earth can do so by opening Google Sky and hitting Ctrl+Alt+A.
So if just another thing to do if you’re looking to waste some time messing around on your computer, only you get to feel like a real pilot.
Bi-Tech