Geoff Manaugh of BLDGBLOG speculates on a spectacular use of Enrico Dini's building-sized 3D printer: endless change and renewal as a building could have its own 3D printer constantly printing out new modules, rooms, floors and other components. By adding a tear-down function, the building would both birth and consume itself continuously. From Manaugh:
I think we'll start to see more and more student projects featuring permanent 3D printers as part of the building envelope—and I can't wait. A room inside your building that prints more rooms. It sounds awesome.
Imagine: the building changes as you live within it. You return after a month's absence, only to discover you don't recognize your own home. Only then will the phrase, "things aren't what they used to be" truly apply.