

There are flying buildings. That might be useful, when we come to the space travel and build a big spaceship (how to move things around in space?). Or to build huge self-traveling stuff, like a flying roboport. Or handling of really big items.


The technology of the flying buildings are simple, cause the ground of the ringworld is a superconductor. The houses are flying by minimal (near zero, cause of superconductors) power usage.
For Factorio this means, we need to lay the ground out with superconductor-plates. This matches also to some often mentioned suggestion to have plates, to protect you from digging worms or have more speed on ground, streets and so on.
In other words: To have flying buildings (or other flying objects), we need 2 basic technologies, which are plates and superconductor. That might need more stuff. The plates need to be build in a minimum distance (like about 10-30% of the ground must be covered per chunk).
This is also the base technology for expansion in a 10-20 times bigger scope than now.