What's cool here other than the fact that it seems to react really quickly is that it has no universal conception of location, like GPS. Nit-picky robotics eng

What's cool here other than the fact that it seems to react really quickly is that it has no universal conception of location, like GPS. Nit-picky robotics engineer chiming in: it's not reactive. The planning is done ahead of time, and they expect there to be no dynamic obstacles in the environment.