That is art right there. I'm not sure it's thats useful on Earth where we have so much pre-existing infrastructure available for construction. However on the Moon or Mars it might be amazingly useful.
On the Moon or Mars was my immediate thought too. A team of robots could build a bunker by sealing off an impact crater for the first humans to live in.
However on Earth, I could easily imagine these robots being useful too. When they get more advanced, reducing/removing the human labour will mean we will get much cheaper buildings with really creative designs.
