[Gravityloss]

Really high torque and power electric motors and generators in a small package.

That's why the US navy is heavily into this - for submarines and ships.

It'd also make very large offshore wind power plants potentially cheaper.

Electric / hybrid propulsion in aircraft is another. When your thruster is just a light fan, you can place it in the best aerodynamic / least noise generating position, then put the power generator and batteries where there's space and it makes sense for center of gravity. You could have rejuvenation of near city airfields again.