South Korea is really committed to bringing this product to market, they have huge buy-in from the Government and Industry. I did some poking around 4/5 years ago when they started talking about it and the folks I spoke with said it's not just blind ambition, there is a strong will to make it happen. They've made quite a lot of progress, I'm still very skeptical people want to use massive drones to move around, but I think this might end up being one I'm wrong on.

https://www.youtube.com/watch?v=jKGK_8gmNQ4