I think this solves a number of problems. Foremost the horizontal movement between buildings. China has a lot of these towers and typically there's skyways to w

I think this solves a number of problems. Foremost the horizontal movement between buildings. China has a lot of these towers and typically there's skyways to walk across. An elevator that moves horizontally could make it easier to move from 1st of one building to 30th of another. Another point made in the video is that the elevators can move around one another. Solving the issue we have now of a single shaft moving one car to multiple, busy destinations (i.e. the morning rush) allowing multiple cars to use the same shaft to work around one another. All in all I think this is aiming to solve the two greatest problems: time, and cost.