I visit those Pizza Hut express stores and watch them make my pizza all the time. I don't see anything they do that couldn't be done by a fairly complex vending machine....
Actually, the original wasn't a bad example, because the Pizza Hut Express stores already cook pre-made pizzas by putting them on a slow conveyor that goes through a small oven. Okay, so they turn the cheese pizzas into pepperoni by putting peperoni slices on top, but I'm sure a vending machine could be made that does that much.
