Street view's biggest revolution?

I love Google Street View. The thing that fascinates me most is what happens if they (or someone else) do this kind of thing for 30 or 50 or 100 years. Imagine the historical value of an archive of photographs showing most of the country on, updated every year or two. The potential research value is incalculable. Sociology, economics, anthropology, urban development... Pretty much every social science field could find something of value there. It will be like a time machine. The only down side is that it's just now getting going.