If this Segway is as easy to manuever as they say, seems to me there is a huge potential for elderly care. People who can still stand and walk a bit, but not capable of much distance walking.
Who wants to be seen in a wheelchair or behind a walker? Take the Segway! If either of my parents needed something like this, I would lay out the 4 grand in a heart beat.
The kids and I would be fighting over who's turn is next. Hey Grampa! Charge up the Segway! We're coming over for a visit!