It’s just as it sounds. Just Google power over the air.
Lots of different applications for it. Mostly it’s using some kind of wave to power devices from a distance. Currently it’s on a few watts at a few meters.
Pretty shit but actually would be useful as your phone or devices would discharge slower and you could charge at the end of the day
With planes it would be a bit different. Fuck knows how they’d manage it. But still something to look it.
Similar to wireless charging. Some countries have roads that charge electric vehicles as they drive.