Having established the basic mechanisms for a flight simulator, it's something of a mystery why Google Earth haven't extended the concept to far more than the two aircraft it features.
Imagine being able to pilot a helicopter! Or a space shuttle! Or for that matter, a submarine, or car, or boat...
Well, what google earth don't do can always be done by someone else of course.
You can pilot an airship, or sail a boat.
that's about all. You have to use your imagination, and pretend that if you smack into something that isn't water, bad things will happen, as the ships will sail merrily on through parks, gardens, fields, mountains and buildings, almost as if they weren't there, but it's an interesting way of looking at the scenery for a while.
They promise improvements in version 2...