Last Thursday at TED, Microsoft wowed the crowd with their latest update to their search engine Bing. Blaise Aguera y Arcas, who is the architect of Bing maps, demonstrated a live video mapping feature. During the demo, he zoomed into 3-D images of the streets of Seattle which also has integrated live video.
This add-in to Bing could be a very useful feature letting you check traffic levels, crowds waiting outside of stores and restaurants, etc.