Good reading: https://en.wikipedia.org/wiki/Post-scarcity https://en.wikipedia.org/wiki/Kardashev_scale then follow it up with a bit of 1993, https://edoras.sdsu.edu/~vinge/misc/singularity.html and https://web.pa.msu.edu/people/yang/RFeynman_plentySpace.pdf
(oh, huh, I just noticed that There's Plenty of Room at the Bottom starts with a reference to the discovery of superconduction)