https://en.m.wikipedia.org/wiki/Superconducting_magnetic_energy_storage https://en.m.wikipedia.org/wiki/Superconducting_magnetic_ene... Basically really high d

https://en.m.wikipedia.org/wiki/Superconducting_magnetic_energy_storage https://en.m.wikipedia.org/wiki/Superconducting_magnetic_ene... Basically really high density batteries that work efficiently forever, zero friction bearings via levitation, zero resistance long haul energy transport, and an MRI you can probably run on household current. Plus maximally efficient (not perfect efficiency just the best we could theoretically practically get) energy storage, transport, generation, and conversion back to motion.