I’ve used Google Earth to look at the locations of holiday cottages etc before we book them.  Sometimes it’s hard to work out just where the place you’re looking for is.  Sometimes if the images are from directly above you (well at least me!) can’t always notice churches etc.   Some images only made sense once I’d seen the place for real.  Some areas don’t yet have detailed views.

The privacy thing is a bit worrying as the images get more detailed and updated faster.  It’s a very useful tool to help you find your way around, but in the wrong hands and put together with other information could make protest about unpopular governments etc difficult.