There has been an RC glider community doing dynamic soaring probably for decades, it's easy to find videos on youtube.
Basically it's just extracting energy from the wind velocity difference.
Of course you could use it at much larger scales, like a huge UAV dynamically soaring high up if the winds are in different directions at different altitudes.
Rc gliders do it behind a ridge, taking advantage of big wind speed differences caused by the ridge. It's pretty fantastic to see in a video or in real life.
But I'm not sure whether it translates to generalized flying at high altitude - is there enough windshear without a close-by hill for this to work? Can it work in any direction?
There has been an RC glider community doing dynamic soaring probably for decades, it's easy to find videos on youtube.
Basically it's just extracting energy from the wind velocity difference.
Of course you could use it at much larger scales, like a huge UAV dynamically soaring high up if the winds are in different directions at different altitudes.