Hm. Calling it a failure is pretty strong. It is used. What hindered it was a) the expensive price and b) at least in many country it was/is illegal to use. Is it like a bike? Or like a motor vehicle and needs insurance and license tag? A drivers license? Can you ride it on pavement or do you have to use the street?
http://www.telegraph.co.uk/technology/news/11926027/Hoverboa....
> like the Chinese clones
A bit sad: Segway inc was bought up by one of these Chinese clone companies (Ninebot) for its patents.