The world doesn’t come with borders or markings.  Why hasn’t Google Glass come up with an app for that yet?  It seems like you could easily determine borders and roads and rivers with a little GPS magic to determine your altitude and location.  It would then be a simple matter of putting an overlay on the glasses to let you know what’s below you.  You should even be able to identify other planes that pass by and be able to determine their destination and such.  Oh, and clouds!  With Google Glass’ camera, you should be able to look at clouds and it should be able to tell you what kind of cloud you’re looking at.

Get on it Google!  You come up with an app like that and I will buy a Google Glass.