I'm a longtime sailor and did a bit of kiteboarding back in the early 2000's when the kites were a lot less safe than they are now (they automatically dive now when the rider loses control, which I would have loved instead of being dragged onto a beach and into a fisherman's truck)

The amount of power generated is insane, but I would love to see a computer controlled kite instead of relying on a human to keep the kite moving in a way to maximize power. The margin of error can be small there.