It's a tech demo. It's not quite there yet.

It is impressive tech, but you are right, it looks like the person has sh*t their pants and are gingerly trying to get to the bathroom.

It looks like it's limited in speed.

It looks like their shuffling not walking.

Quiet possible a balance issue. When walking you are moving you mass forward this pushes your feet backwards I would imagine that if not carful it could cause you to fall

Walking normally would probably result in you falling forward.

This is basically like walking on ice, except you slip more slowly, and you also un-slip (your feet are actively moved) occasionally to recenter.

That limits both the speed you can pretend to walk, and the speed at which you can be moved back to center; because both relative movements are working against your natural balance.

You will never be able to work with or against the inertia of your body weight. That is the core limitation of any treadmill.

If you walked at normal pace and stride I bet you’d just walk straight off the mat

Pretty sure it's because this demo floor is so small - in the clips of two people on the mat at once you can see if they took larger steps they'd physically step off the mat. I hesitate to assume what it feels like, but I imagine larger area mats may allow more natural steps