About half the cost of building a house is labor. They say in the article that aside from the guy running the printer, there are no labor costs here. I don't believe that's necessarily true, because there's still got to be somebody wiring the electrical and installing windows, but regardless, it could dramatically decrease the cost of building a home. It could also be a lot faster. Imagine that, just rolling up two trucks to a construction site: one carrying the printer, another with all the crushed rock, setting it up and letting it go. A week later, a finished home ready for a family to move into at half the cost. That brings the dream of home ownership within the reach of a lot of people who wouldn't have been able to afford it before. We live in exciting times.