My hat off for the practical, efficient Japanese people. This machine replaces both the cashier and the waiter. You choose your dish, buy your food ticket from the machine, give it to the cook, he makes it for you and you bring it to your table. That's why the tickets are color-coded and have the name of the dish and the price on it.
Is it possible in the future, your hot dish comes right out from the machine like a can of Coke? Yes, for a country famous for its wide use of vending machines.