Photosynth is a promising project from Microsoft associating web 2.0 contents, an amazing visualization interface and a geo-positioning module.
To make it short it matches thousands of pictures taken from many people and strored on Flickr to recreate a 3D view of a place.
The project is still tagged as a "lab" project by Microsoft.
This kind of next generation interface takes all its value when it is navigated with a next generation interaction technology like Ubiq'window. Ubiq'window's interactive screen technology lets users manipulate the content with their hands and get rid of traditional human-machine interfaces like mice and keyboard.
This opens opportunities for "barrier-free" interaction with dynamic signage content (advertising), cultural exhibition (museums) and retail environments.