I saw the original speculation about it being some sort of scooter. There is one reason that it's very overblown, the same reason all forms of mass transit are overblown.
Ya can't stop at Safeway after work, buy three bags of groceries, and load them on the bus with you.
But think of how it will revolutionize Shriner's parades.
Poppycock. If it is indeed nearly impossible to fall off this thing, and it can traverse different terrains and obstacles, it would be far easier than taking a car.
Right now I can pack a bag of groceries in my bookbag, and hold one in my hand. Instead of spending 10 Gs on a car, if I really don't need one, I could spend what I might on a top line computer and save how much on parking, gas, and other expenses? If it cuts my travel time to some of the places I go by 75 percent or more, than I can simply make two trips to the grocery store and still save significantly on time.