I'm sure this is very clever, and I can see how it would be brilliant on Mars. But there's something a bit unsettling about it for me. Imagine a pack of the darn things headed your way with some sort of weaponry, or a bite.
Yes this is aimed at carrying equipment for the military etc. The one you see walking of course is the small one. The one on the right is a lot bigger! And various sizes in between.
And I doubt you'd outrun Boston Dynamics Cheetah robot: