I mean, it depends a lot on how ductile a final product is. High temperature superconducting "wire" took a long time to become realistic. If you somehow made a

I mean, it depends a lot on how ductile a final product is. High temperature superconducting "wire" took a long time to become realistic. If you somehow made a ductile and inexpensive wire out of it then it's going to be everywhere (and lead poison everyone for generations, but that's progress for you). Of course if you can make wire out of it, I wonder how much smaller your fusion reactor can get? There are a lot of applications for even a thin film, consider spray coating a resonant cavity with it. I'm sure there is a way to improve almost anything you could think about if you start talking about making CPUs with lower heat dissipation, perhaps enabling 3D designs and much more efficient computing... [edit: obviously there is a limit from literally the entropy in computing and transistors are most of that, I wonder if the superconductor is a good thermal conductor...] I'm sure there are at least 222 startups that have some idea they're pitching right now ;-)