Re: Amazon for Groceries?
>so what happens to the frozen goods that I might buy from them if they do the same?
That's a question of implementation, not concept. In theory a refrigerated delivery van *could* bring frozen goods to your door in a better state than you could (if your car doesn't have air-con). Other options include a reuseable thermal box, and maybe a phase-change thermal store 'brick'.
The rest of your points are valid. People's shopping habits vary a lot, but some might have a supermarket deliver the bulk boring stuff and get meats from a local butchers. I use Lidl for many items, but use Sainsburys/Waitrose for other stuff, a farmer's market if I'm passing... My habits are partly informed by my drive home from work.