2. I think you missed my point. The fact that BD chose to use a bipedal design and deal with the associated balance issues for a robot that needs to work in a human environment shows that there is merit to the argument that it's not just a gimmick.
Maybe, but not necessarily. The balancing and maneuvering of the BD Handle might be similar to that of a Segway or a hoverboard. Climbing steps, curbs and other uneven terrain is a different ballgame. I would imagine that a design closer to what's seen in stair climbing wheelchairs might be more practical.