I think 3D printing is similar to copier/printer technology about 15 years ago. Back then, you could have your own deskjet printer at home by that was only for low quality stuff. If you wanted professional prints, you would go to a Kinkos etc. Now you can get great quality prints at home with a cheap lazerjet. Similarly, I think in the next 10 years 3D printing will evolve to a point where everyone will have one in their home.