Would majorly increase the efficiency of electricity transmission and also computer processors and other electronics and also all sorts of applications we have for very strong magnets.
Super conductive materials have essentially zero electrical resistance but until now we've only been able to make materials super conductive in extreme cold and/or under extreme pressure. Resistance is responsible for the heat processors and other electronics generate. It also majorly caps how far and how much electricity you can transmit over a given distance without a lot of wasted electricity or the lines overheating and failing.
Would have huge implications for energy infrastructure and generally just making a ton of the electrical devices we use much much more efficient.
Also they can be incredibly strong electromagnets and would really beef up our maglev tech for things like trains. They also have a lot of utility for quantum computing. You could expect to see computing power across the board to skyrocket in the coming years if this is for real.
Pretty exciting. It would really be one of the most groundbreaking developments in materials science and I guess you would say physics in a while.