Not sure you Barbie "lovers" appreciate the scale of this.
These machines will be printing aluminium ( 660c Melting point ) within 3 years and other sintered metals within 10. At the moment you yanks are still fairly good at design but are getting everything made in China. This technology offers you a chance to save your national economy.
There going to be a mad scramble to 3D-Scan everthing, (imagine the copyright privacy issue's when you can down load a new set of carbs for a 67-vette)
Also think about nano=faxing, with a 3D scanner one end and a 3D printer the other or
going down to a bodyshop and having a new fender printed ...awesome http://www.jaylenosgarage.com/extras/articles/jay-lenos-3d-printer-replaces-rusty-old-parts-1
All Tomorrow's Parties by William Gibson
Recycling is really going to get a boost as well, who's going to want to throw away aluminium or plastic when you get use it as a Toner-Refill instead.