I just started working in the engineering department for a large consumer electronics company last week. They have 3 rapid prototyping machines. I was able to watch a chassis being made yesterday. It was astounding. I think only one of them will scan. The rest take data from a CAD program to build the prototype.
I don't think the ones we have are nearly the resolution of the 3D printers in the video. They are probably much older. But it enables you to build near production prototypes. You can tell when you a holding a prototype and not a molded piece. They are a little rough, and look like they were filed to get their shape.