The realm of 3D printing applications is getting bigger and bigger (pun intended). After some timid experiments, it seems someone is going for the big target of building houses: look at how this villa was built, with secret materials, in only 15 days.
The buildings that they are fabricating are strong enough to withstand 9.0 magnitude earthquakes, stand up to harsh weather, and provide for superior insulation. Better yet, the material that these houses are constructed with also generates negative ions on a permanent basis, a feature that many Chinese will be quite happy with. On top this, the buildings are also fireproof, waterproof, and virtually corrosion-proof.