[chii]

For one, lossless storage of electricity.

[dgoldstein0]

I think you mean lossless transmission? If we can actually replace transmission lines effectively with it, unclear whether it's practical for that yet.

[heisenzombie]

Also energy storage: https://en.wikipedia.org/wiki/Superconducting_magnetic_energ...

[dgoldstein0]

Neat, I hadn't heard of it, but totally makes sense

[jacquesm]

That's how superconductivity was demonstrated in the early days: a current in a loop that didn't decay.

[Sporktacular]

Both. There are coil based ideas for storage.