These are cool in a way and all over NYC, but that kind of a tourist thing and they aren't as practical in other cities where it isn't faster to just walk places. I couldn't see many people using these as general transportation, however, I could see them used in a commercial area to sell things around city blocks etc. That is about the only practical application in an American that I can think of.
That electric one could use some modification if you ask me, looks like it would fall too far in the front corners on turns.