1. Potential for less waste through 1) people not avoiding ugly produce, 2) not leaving refrigerated stuff on a non-refrigerated shelf, 3) leaving freezer doors open, 4) stealing things.
2. Less congestion in the browsing section.
3. Better stock tracking.
4. Easier stock management. You don't have to have people move stock between a warehouse and a shelf.
5. And yes, you don't have to push a cart.
There are significant drawbacks too. The biggest one I can think of is that the fulfillment mechanism doesn't actually exist.
Wrt 3 & 4, when you've practically got two whole stores, one with stocked product and one with QR codes, you're not saving space or stock management. (You're not going to go straight from shipping boxes to customer's hands)
No idea why you are conflating the desire to push a shopping cars with the ability to cook food..
Maybe it's true, and carts are a great burden on many people. I've just not seen it myself, so I'm a bit flabbergasted. Especially since children can ride in carts.
Imagine being able to open a Walmart Supercenter in the middle of, say, San Francisco(like that would ever happen but anyway). They'd never be able to afford the real estate for a traditional supercenter, but they might be able to afford a super-tower.
Not to mention, until robots can handle every variety of produce and package, isn't the real life manifestation basically going to be a sixteen year old dashing about in a mirror-store hidden in the back, tracing your footsteps, picking up the things you scan, and putting them in a cart?