I should imagine that the main target market is China. There are parents with money, and not time, who feel guilty and want to buy the biggest toy in the shop. There will also be bragging rights (face culture is important here) pond side, for the dad whose kid has the biggest toy.
There is also a big demand for plug and play (anything). The parents (often both) work long hours, kids often board (even in the local school), and get plenty of homework (daily and at weekends). Also at the weekend a lot of kids will have private lessons (maths, English, Chinese, piano, dance, or something else). A lot of middle class kids will have upwards of 4 hrs of private classes on the weekend. Homework starts at about age 6, and they get 2 hours per night, plus weekend.
Even 10 years back, before model boats took off, I went to model stores and found that most of what was on display was Raptor helicopters (not for novices) costing lots, and fixed wing models with 2m wingspans (also not for novices). Basically high price tag items. I imagine a lot of this stuff was taken out and crashed once. I can see the Graupner Premium range fitting in nicely. The model shops will also earn well out of fitting the radio gear and maybe trimming the models to float correctly.