The things this can do is incredible... carrying objects that are handed to it, setting them down and picking them up, walking along with a person as they change gate and direction, running at 6km/h and coming to an abrupt stop without forward momentum, at running pace, both feet are off the ground during the stride... pushing a cart...
...walking and running in smooth, natural circles. It's incredible.
(I know this is not *new*, but I didn't see anything about it in here already so I thought I'd share it with the uninitiated)