In my opinion, using humans in the loop to generate training data in a store like this is perfectly legitimate. If I were building it, I would do it the same w

In my opinion, using humans in the loop to generate training data in a store like this is perfectly legitimate. If I were building it, I would do it the same way: start out with the whole thing being people watching cameras and labeling training data, and slowly apply software/ML engineering to improve the automation rate. In fact, this approach is the opposite of putting the cart before the horse: you test the market risk before you solve all the technical problems. The right way to find out if customers want this type of experience is to bring it to market and find out.