Earlier quoted context omitted.
> I don’t understand how superconductors will make phones into supercomputers. Currently transistors and connections use a lot of power just to transfer some bits, superconducting wires and maybe transistors would help. > Also, how does this help fusion become possible? Stronger magnets which you don't need to cool with liquid helium will help achieve better plasma confinement.
Superconductors may reduce power consumption but they don't do anything to improve transistor density.
I think the implication is that clock-speed could start increasing again. It would probably require a completely new manufacturing process, but if we assume this superconductor is legit, perhaps an older process could manufacture it.
If so, maybe we could have (just spitballing here, I have no idea) 28nm super conducting CPUs that run at a 1thz instead of 4ghz. That would be quite an improvement over today's CPUs, even with fewer transistors, I think.
There are other losses and limitation in increasing clock-speeds aside from just resistive losses, but I think they are a significant part of the current bottleneck. Other losses involve transistor switching losses, and inductive losses but I don't really know the details, and I think those details change with superconductors.