I could hear the Jetsons theme playing in my head while I wrote this — the future is here. In a video on his website, Jay Leno demos a consumer-level 3D scanner, showing how it can be used in real-world applications such as automotive restoration. He scans a broken steam valve and sends the data to a 3D printer for mock-up and to his CNC machine to mill the final part.
I was amazed that the 3D printer can even make models with moving parts. Jay shows a wrench that was printed with perfectly moving parts already in place, just like the original metal one!