The critical temperature is 127 C, as the other commenter mentioned. That seems like it's high enough to be useful in a computer CPU.

I suppose there might also be applications for power distribution in a data center. You might use a few large, high-efficiency low voltage DC power supplies to supply the whole site instead of hundreds or thousands of individual power supplies if electrical resistance in cables was less of an issue. (I think this sort of thing is done now, but more at the rack level, since long cable runs cause losses.) You might even use 1V power instead of 5V or 12V.

(Granted, superconducting materials don't have unlimited current capacity, and bad things happen if you exceed the limit.)