As NASA prepares to return to the Moon in the next couple of years and possibly even establish bases, it needs a better understanding of how the human body performs in such an inhospitable habitat.
3D printing could allow astronauts to construct whatever their lunar colony needed from raw materials.
We can assume that the first Moon bases will have to be pre-built on Earth.
Inflatable habitats provide a scalable future for extraterrestrial habitation, providing they pass safety and durability requirements.
If the human race is to survive in the long-run, we will probably have to colonise other planets.