I don't understand who this is for. To be able to remain balanced on a small patch of ground that can zip around in any direction under your feet with no handholds requires MORE balance than ordinary walking. That means that almost anyone who could safely use this would have to be healthy enough to walk normally. Walking is almost as fast, vastly more flexible, convenient, reliable, cheap....

Yes, it's more tiring, but someone who could safely use one of these could also safely cruise around on a scooter with larger wheels and a handle for much higher speed, much lower cost, more stability, no fear of running out of power, better handling over uneven surfaces, etc.

The people who need powered transportation on walkways tend to be those with limited personal mobility, and most of them would be at great risk balanced on one of these things. They need something stable to sit on, not something unstable to stand on.

The best market I can think of for these things is relatively young, healthy workers gliding around the smooth floor of a very large warehouse all day long carrying small objects. But that's not how they seem to be positioning this thing, and most of those jobs will be robotized, because the little warehouse scooter doesn't really need the person.