I'd like to add to your excellent ELI5 explanation that removing the walls also means that super conductors don't generate heat. Normally those people would bounce off the walls and all that bouncing makes the room warmer. They're also wasted energy - you pump those people into the system, but all they do is make things warmer with their stupid bouncing. Since lots of electrical components will melt if the temperature gets too high, this also means you have to either waste power on cooling equipment to keep things cool, or limit how much power you pump into the system to ensure the rooms don't get too hot.
This heat generation is putting some hard caps on current hardware designs and speeds especially for computer components.

But if you could build computer components with superconducting circuitry, it would firstly use a lot less power, and secondly you could make it go much faster without risking cooking the components. So for personal devices and PCs, this would have huge potential.