Look, I know this might not be a popular view here on HN, but I think this is useless. And bad. I'm not talking about the technology behind it (I think it's an amazing achievement).. I live in Barcelona and I have at least 5 medium-sized supermarkets within 5 minutes walking distance from my home. Plus there are several smaller shops that sell fruits and vegetables. I know all the people who work in these supermarket…
If that's true, then you have nothing to fear. People will pay extra to shop at stores with human cashiers, and the machine-driven stores will not be able to compete. However, I suspect that when presented with the choice, people will take the machine store in exchange for lower prices. And I suspect that you suspect the same thing, otherwise you wouldn't be concerned.
Economically it makes more sense to buy cheaper and faster. But this eats into the fabric of society and offers nothing in exchange.
And what are all these people supposed to do then ? Sleep all day ? They will fight back with their votes at first, which they are already doing in the US and Europe..
Then there's the centralisation, control and privacy part - amazon gets to decide what products your area will be supplied with, it gets to know your eating habits, your walking habits, etc. Will pretty much own you and the neighbourhood.
But then again, I don't really see an alternative - it seems that we're being 'innovated' by force into the future and there's nothing we can do to stop it.