While it's quite interesting that someone has made a 3d printer this big. You can't literally print a house with one of these. Just think about a typical wall build up, it will be something like this: dry lining, vapour control layer, insulation, air gap, <magic printed sandstone structure>, waterproofing and or rain screen. The basics you need are to be able to print a structure which is waterproof, has a U-Value of 0.2 w/mk, is fire resistant and has some tensile strength. The material in the OP is 'like sandstone' which is structurally useful only in compression. So you couldn't print a skyscraper or Frank Lloyd Wright's 'falling water'. If they could print fibre reinforced concrete then it wouldn't be so limiting.<p>Also, bear in mind that the 'shell and core'; the structure, cladding and primary circulation is generally less than half the cost of the finished building. E.g. all the HVAC still has to be installed by hand. Innovation in construction is notoriously slow moving; even quite simple innovations can take 50 years to be widely adopted. It's also incredibly heavily regulated in most countries. I think that modular construction is more interesting avenue to explore. Most buildings are the equivalent of 'spaghetti code' there is lots of progress that can be made by modularising parts and standardising interfaces. Architects like Bucknister Fuller, Otto Frei, and others did lots of interesting work in the 1950's on modularisation but the concept hasn't developed much since then.