Could this be the future of building settlements? Here on earth, in space: any other terrestrial planet and any other natural satellite that possesses a sandy surface. (moons)
Imagine, an enhanced and much larger version of this machine pumping out entire structures.
If we are going to colonize other worlds, then we need to use as much of the local resources as possible.
Update: June 20, 2014:
I just noticed this on Twitter. NASA is working on a 3d printer that is designed to print structures using dirt.