Researchers are working on a cabling system that could provide data transfer speeds multiple times faster than existing USB connections using an extremely thin polymer cable, in a system that echoes the design path of Thunderbolt.
An Apple Thunderbolt 3 Pro cable

Presented at the February IEEE International Solid-State Circuits Conference, the research aims to develop a connection type that offers far better connectivity than current methods. In part, it aims to accomplish this by replacing copper wiring with something else.