Prof. Mathias Noe and Dr. Markus Bauer published a paper about the application of superconductors in high-current cables in Physik unserer Zeit.
You can download the paper here: Paper “Without Resistance”
Superconducting cables and wires are well developed and the first economic applications are foreseeable. One obstacle to widespread application is the still insufficient number of successful prototypes in long-term use. On top of that, there is a lack of knowledge about the many possible applications and the degree of maturity of the technology.