Though realization of this effort remains distant, it's notable to show how the thinking--and money--is moving to scale 3-D printing well beyond the desktop.
Further out on the horizon, this scenario means a greater coupling of biosystems and computation to evolve the living city. Bacteria will be engineered to target specific materials, like aging concrete. Released into cities, they will replace the old stuff with new bacterial glue that’s structurally sound, networked, and computational. Other bacteria could perform similar maintenance by retrofitting aging utility conduits and faded solar skins. Protocell computers could also be released into ecosystems, sensing chemical properties and transmitting them on mesh networks to remote dashboards. Vats of bacteria will pump out fuels, protein resources, and water.