[what_ever]

I don't think the parent comment means people putting things in the bag. They just walk with phone, scan the items they want to buy which get added to bag automatically by robot/someone else and customer just walks to the counter at the end to pick up their bag.

[bduerst]

I see, my bad. Still, why even walk around empty aisles full of food pictures then?

It seems like a strange UI for something that could just happen in the app before you even get to the store. Seems like a waste of space too since everything will be itemized and stored in the back on shelves as well.

I understand that user behavior doesn't turn on a dime but Amazon customers are already used to ordering online.

[01100011]

I'm saying have items for display to allow for browsing. You don't need shelf space for 24 boxes of cereal - you keep them upstairs. The aisles can be narrower(no carts, shallower shelves) and you still have the experience of browsing and getting people to make impulse decisions. It's like a hybrid between browsing Amazon and being in a real store.