I thought about this back when they had the wheelchair-using crewman in the first couple of seasons of Discovery - I think I've come down on the side of "sometimes the old ways are the best ways" with stuff like this.

You can't suddenly lose power and crash your wheeled chair. For all we know, it's got some sort of powered unit for use when the user encounters a steep incline or flight of stairs or whatever.

But for everyday use? Yeah, I'll stick with wheels.