SuperTurbine ™, AirLoom, Airborne Seaborne Wind Energy Systems, and perhaps some other systems can be seen as AWE / HAWT hybrid systems, although they do not have much in common.
Generally they are designs using the air to borne a part of the structure without really fly. Perhaps some key could be found in order to mitigate the cantilever effect of HAWT and reach higher altitude while sweep more.