The Video Trace system isn’t completely automatic. It requires a modeler to mark the boundaries of surfaces in at least a few frames of video. But it does seem extremely fast and well-integrated.
This isn’t quite ready to turn, say, Google’s Street View photos or video into 3D models just yet, but it’s close. Once the system can infer surfaces without human intervention, perhaps only requiring people to go in and fix mistakes, it might be ready to scale up to cities. Right now, it would still be too labor intensive. But it’s impressive nonetheless.
I tried linking the video here, but it’s being difficult. Click the link above for an interesting demo of their approach.