I saw some videos about the eCopter, which is a small person-sized helicopter being developed by a company called FlyNow for use as a small passenger shuttle and also small cargo shuttle. It's supposed to be relatively short range, since it's electric. But it seems meant to be used as a short-distance shuttle in what would likely be an urban environment. Its development is apparently being funded by Saudi Arabia for some Expo event which will happen in 2030. But I'm wondering how viable the concept is and whether there's a viable market for it?