We have new and smart ways of building houses. Typically, it can take anywhere from six weeks to six months to build a 2,800-square-foot, two-story house in the U.S., mostly because dozens of human beings do all the work. But a new prospect may change everything. It is possible than within this decade Contour Crafting (a sort of large scale additive manufacturing) will have become so advanced that we will be able to upload design specifications to a massive robot, press print, and watch as it spits out a concrete house in less than a day. No humans required, except for a few supervisors and designers.