The Segway is quite large and needs parking or storage. Also, it can't go up stairs. Hoverboards can be picked up and carried easily around an office or home, and can be tossed under a desk or in a backpack for storage.

A Segway is like a bike in that you always have to be thinking about where to put it when you arrive. Hoverboard is much more like walking, in that you can toss it in your backpack or just carry it when you arrive.

Though I'd rather just walk.