It depends really. High temperature superconductors were incredibly hyped when they first came out, but the problem is they had a limited critical current and c

It depends really. High temperature superconductors were incredibly hyped when they first came out, but the problem is they had a limited critical current and critical field strength so applications were(and to some degree still are) limited. These are the maximum current and magnetic field a superconductor can carry before superconductivity breaks down. If room temperature superconductors turn out to have a high processing cost and the critical current/field strength isn't that high, then the applications are going to be limited.