

Stop & Shop in the US does this (or at least it did? I never used it so I barely pay attention to it lol). There’s like a wall of handheld scanners you can pick up when you enter and a little place on the cart for them to go in. You can scan and bag your stuff as you go and then pay at a special register.
Thats pretty cool. Using steam pistons to help compress the fuel enough for fusion, from which that heat gets used to make different steam to then make electricity.