The automated processes have definitely taken the charge in lot of sectors. Its actually a little surprising that they have waited this long to deliver robotics to the the people of real estate.
Perhaps one of the reasons is that unlike most most automated processes the construction work has to take place in an open site and not inside a factory where it can be controlled. The second reason could be that magnitude of real estate project in sheer physical size could be a problem. Unlike a car that can assembled inside a factory and at most would weigh around a ton, a building could be hundreds of feet high and thousands of tons in weight.
Considering all of the above, the 3D printed houses seems to be of a size that could be handled by Automated machine and robotic manipulators. The more I think about it, the more I understand that this could possibly be a huge market, that we all should take a look at.