Wow, what an Easter Egg! (Yes check it not really the first of April…)
You can now enable a Flight Simulator Mode, find out more on GEarthBlog here.
Beware tho its kinda hidden and might take a bit of fiddling to get it to work… basically you hold down Ctrl-Alt-A (capital) on windows. However I found I had to change my language settings in Windows Control Panel to ‘English (United States)’, I had it set to UK English, and try as I might it wouldn’t work. Closing GE, changing the language setting, and reopening, it worked first time. You can even change back to UK and it will still be available in the Menus, but the keyboard shortcut no longer works. YMMV.
I’ve long been a fan of MS-FlightSim, and installed lots of packages to get high-resolution imagry and meshes (often to great expense!), to find this in GE is simply mind-blowing.
One last thing, as I’ve never been a fan of keyboard for flying (as the primary controls), I see the mouse works quite well, and is responsive and intuitive, thanks guys and gals!