[flak48]

Their whole selling point seems to be that their hardware + software can count people accurately without needing a camera. The premise being that cameras spook people.

Cameras are already commonplace enough where I work, for security purposes. So not sure how easily cameras can be eliminated.

The dashboards they provide don't seem to be have to be coupled to the kind of ($850) hardware they are selling. Like you said, cameras should be able to do the job.

[afar]

I don't think cameras will be displaced / eliminated. It's just a question of whether or not they will be accepted as a form of active surveillance or remain a method of security. Today, they are largely security but it's entirely possible the world moves toward mass surveillance.