If you're not limited by propellant, it seems like this would be really useful for satellites that need to change orbit frequently. Performing a plane change,

If you're not limited by propellant, it seems like this would be really useful for satellites that need to change orbit frequently. Performing a plane change, for example, normally requires a prohibitive amount of propellant, but if that is essentially free, you can change orbit at will, albeit somewhat slowly.