The biggest question for me is if it will be cheaper to have same day or same hour delivery by drone than just walking or driving to the store and buying it. I use Amazon now because for almost every single item, Amazon is the cheapest place to buy it and I'm willing to wait a day or two to save 10-20% than if I bought it somewhere locally. If getting a drone to fly it out to me costs an extra 10-20% on the item, that basically negates the value of using Amazon to me.
Articles like this also beg the question, why doesn't Wal-Mart do delivery right now? If pizza can do it, why doesn't Wal-Mart have delivery guy at each ___location that fulfills local orders from Wal-Mart.com? Either 1) They've never even though of that (not likely) or 2) they evaluated that option and figured out it wasn't economical. I doubt having a drone swarm is going to be cheaper than paying some teenager minimum wage to drive around in his car delivering stuff (at least anytime soon).
"that basically negates the value of using Amazon"
Then you don't have to go there, which has some costs.
I'm surprised no prescription/OTC mobile drug store service exists. Seems an obvious "start up" delivery service.
Another obvious one is once you have kids, suddenly going to the store has all the behind the scenes effort and stage drama of a major theatrical production.
Bad weather.
Chronic illness / old age / extreme final days of pregnancy.
There is another problem with the walmart example; its extremely rural roots. I never set foot in one until the 00s or whatever when they started aggressively expanding into urban / suburban areas. I estimate that the majority of their stores are still in extremely low population density rural areas, even if the majority of American shoppers are vaguely urban-ish. So it would be easy to roll out a delivery service for the store (or pizza restaurant) in the loop of downtown Chicago, but not so easy in rural Louisiana.
There is also an interesting demographic issue where walmart shoppers have something of a financial reputation. I tend not to eat grains much but recently ordered a dominos pizza anyway, and was surprised its something like $20. Given the reputation of the walmart demographic I don't think they would get many sales at 150% of supermarket prices for ... anything.
Articles like this also beg the question, why doesn't Wal-Mart do delivery right now? If pizza can do it, why doesn't Wal-Mart have delivery guy at each ___location that fulfills local orders from Wal-Mart.com? Either 1) They've never even though of that (not likely) or 2) they evaluated that option and figured out it wasn't economical. I doubt having a drone swarm is going to be cheaper than paying some teenager minimum wage to drive around in his car delivering stuff (at least anytime soon).