Yeah, there's a little corner place near here that has pre-made (not by them), pre-packaged sandwiches and lunch rolls in an open fridge/display in front of the register. You walk in, you pick out your sandwich, you put it on the counter and you pay for it. The cashier is literally that, someone who presses a button picture of your meal on an ipad, inserts a card, and returns card to you...

... and gives you a dirty look when you don't tip for "service".