Energy Economics

No More Power Lines?
These superconducting cables contain special materials chilled to superlow temperatures, allowing electricity to flow efficiently, with little resistance. While Harris’s “hub” would run in a loop, it would demonstrate the potential for superconducting power lines that could travel long distances and eliminate the 7 percent of electricity wasted by ugly, above-ground transmission lines.
I don't get it. They are proposing to save the 7% of energy that is lost in modern electrical transmission systems by supercooling cables? How are they going to do that for less than the 7% energy cost they are proposing to save? Because otherwise it is a net loss.