I could see the advantage of these in swamplands or the 'bushes' if you will (places like remote parts of Africa, South East Asia, parts of the Southern United

I could see the advantage of these in swamplands or the 'bushes' if you will (places like remote parts of Africa, South East Asia, parts of the Southern United States, Alaska, come to mind). But the practical use case I can't seem to envision yet. However, if the goal is to be able to fly these things like helicopters but get some sort of massive fuel advantage out of it, I could see them being used for certain types of deliveries if they can hold a substantial amount of cargo via an attachment or something.