Photosynth - Microsoft do something cool shocker
This will be good. The program analyses photos for similar points and then creates a 3d world from them.
You can zoom in to photos with more detail. As more and more photos are added the world becomes richer and adding in your own photos allows you to explore areas around them using other peoples photos.... doesnt makes sense? watch the vid
This combined with google earth and the matrix is but years away!!!*
* Pending the invention of computer to brain interface