With that quick of a click to delivery, do you really think you'll have the same car traffic? The amount of times you'd need to drive to get anything would dramatically decrease.
That's sort of true now. No one really has to go to Target because we have Amazon Prime Pantry, but I still see that place full of cars. I don't have any numbers, but I'm willing to bet delivery commerce has increased dramatically in the last ten years, but I doubt traffic has decreased proportionally.
For small items, maybe, not for anything too large for a drone to deliver.