I was thinking something similar, and per the Bend Oregon article that was here before (https://news.ycombinator.com/item?id=16517929) it could make commuting work from further away, although with only 100 mile range that is a bit challenging. (Bend to SF is 500 miles)

I am also wondering about the ergonomics for people who are mobility challenged.

On the plus side, their launch material successfully has gotten me past thinking that they are building quad copters for people into thinking about what they might be used for. The numbers pencil out for relatively short commutes.