One of the most promising fields of the near future technologies is that of 3D printing.
We talked in this recent article with reference to food, and now we have the opportunity to admire 3D printers one and a half meters long, capable of pulling out a 700 square meter house in 20 hours.
The special construction process called CAD / CAM contemplates the assistance of the computer both for the part relating to the design and for that relating to manufacturing. Entire housing units will be designed and sent to print as we do today for a written document, and the drawings will become physical objects almost automatically.
The size of the printers, constantly increasing, allows to build walls by depositing the cement layer by layer.
Here is a video showing how the machine works.