Been a while since I used Google Earth, so it's the first time I've seen the 3D buildings effect. Pretty cool. It won't be so dang long before we have a detailed and realistic model of most of the planet. Exciting or scary.
But from there, imagine, there's a quite a step to having a real-time view of everywhere. That would require billions of cameras everywhere. Perhaps not quite as many as the UK government already has installed in the UK, but well up there.
BTW, I wonder if anybody is working on a commercial venture, which is to make detailed computer models of cities and landscapes, real and imagined, good enough to rent out for use in in CG and feature movies! That could be good business. There should be no reason for each company to re-invent the spoon every time they need it.