Could 3D Printing Revolutionize Buildings?

Manaugh writes, "...what if Enrico Dini's sandstone-printing device-so interestingly profiled in Blueprint Magazine last month-could be installed somewhere at the heart of a building complex-or up on the roof, or ringed around the edge of a site-where it could left alone to print new rooms and corridors into existence, near-constantly, hooked up to massive piles of loose sand and liquid adhesives, creating infinite Knossic mazes?"

Note: "Knossic" is a reference to Knossos, a bronze-age labyrinth in Greece.