Does doing that "walk into shop and pay" thing mean you also have to do that old "talk face to face with another human being" thing? Good lord, what would you have us do next? Go to market to buy some fresh meat & veg and prepare an actual home cooked meal?? /s
They used to have large paper catalogues to browse (or take home), but now I think it's computers.
You can order and pay using a terminal in the shop, from a phone app, or by asking the assistant. You get a paper receipt with a big number (presumably something similar on the app, which I haven't used) and wait at the back.
After 2-3 minutes, your order number appears on a screen at the back of the shop. You show the receipt to collect it.
The image in the article shows most of it. Behind the photographer is usually a display of a few things: toys, bicycles, watches etc.
Maybe, but in the UK I'd choose ten other suppliers before giving a penny of profit to a company like Amazon.
Tesco, Argos, the Apple store, Currys, any phone network, Carphone Warehouse, John Lewis...
Several of these have next-day delivery, same-day collection, or even the old fashioned walk-into-shop-and-pay thing.