One advantage could be speed - drones will allow you to move faster for smaller orders. Just like you have the shipping container -> warehouse -> trucks -> loca

One advantage could be speed - drones will allow you to move faster for smaller orders. Just like you have the shipping container -> warehouse -> trucks -> local warehouse -> smaller trucks -> home, you can extend this to respond faster to customer requests, as well as not involve any humans in the whole last mile delivery system (avoiding costs etc)