I wonder if SC tech is somehow based upon this. This is an interesting article about how a practicable EMDrive could be made. "If EMdrive is real and scales with Q factor then we get almost Star Trek level Technology." https://www.nextbigfuture.com/2017/06/if-emdrive-is-real-and-scales-with-q-factor-then-we-get-almost-star-trek-level-technology.html?ref=yfp TLDR The ultra-low electrical resistivity of a superconducting material allows an RF resonator to obtain an extremely high quality factor, Q. Superconducting radio frequency (SRF) involves the application of electrical superconductors to radio frequency devices. There is work to get quality factors (Q) up to 200 billion. For 30 to 300 billion Q factors the power levels for a 1000 ton vehicle drop to the level where, you could use solar power for the EMDrive to counter gravity on earth. It would be virtual anti-gravity. Structures that would be possible would not just be flying cars or floating antigravity but flying cities.