I am big believer that eventually 3D printing will come of age to the point were it will be competitive with molded parts made in expensive tooling. While the world certainly isn't quite there yet, things just a bit more interesting.
Apparently the UPS store is now going to have high quality 3D printers. So if you really want a prototype or if you just have to make a few things for a project, you could upload your files and pick up the finished parts later. This could be a great boost for the guys who make custom parts or always wanted that one special passenger car etc...without having to spend the money to bring the printer home.
fyi- I am in no way employed by UPS or a UPS store - I just think this is a cool development that could impact or hobby in a positive way
Check it out here