it actually is very cool - actually worth opening IE for
I thought it was going to be like that old app by the people who made Bryce3D - that tried to make 3D objects out of photos by getting you to click to show where corner anchor points were - I cant remember wot that app was called - Canoma or somthing - that new Google 3D thingy is kinda like it (but not as detailed or good obv)
go to 'similarity view' and click on different pics - very nice!