I hope they are... it's just that I personally don't see it coming in the near future at least in Germany.
Sadly there are a lot of people here who are kind of anxious when it comes to new tech.
Most people I know of don't even own a credit card and I've never seen anybody but me pay with either the NFC chip in their card or their smartphone. Yes this is a completely different topic but imho it shows that even quite harmless techs like those are viewed very sceptically.

But at least we got the Autobahn. :D

I guess I'll just have to go on vacation somewhere else to fly those things until we catch up with international regulations.