It's obviously not the same thing as a self-checkout machine, but there are automated border control systems in some countries (e.g. Germany). Scan your biometr

It's obviously not the same thing as a self-checkout machine, but there are automated border control systems in some countries (e.g. Germany). Scan your biometric passport, step into the mantrap, look into the camera, welcome to Germany! If it's good enough to let people pass border control, it should be good enough to sell alcohol. The technology exists, I just wouldn't want to use it at a grocery store.