Bipedal locomotion means moving on two legs. It is the feature that makes humanoids fit human spaces: stairs, narrow aisles, curbs, uneven floors, and buildings designed around human bodies.
It is also mechanically expensive. A biped has to balance continuously, manage foot contact, absorb impact, and recover from pushes. Wheels avoid most of that. This is why many useful robots are not humanoids at all.
For humanoids, walking is necessary but not sufficient. A robot that can walk across a stage is not automatically useful in a warehouse or home. Useful locomotion means walking while carrying something, stopping safely near people, turning in tight spaces, recovering from slips, and doing it for hours.
When evaluating a walking demo, look for the surface, speed, tethering, duration, and failure recovery. A clean walk on a flat lab floor is progress. It is not the same as deployment readiness.