Postman robots and delivery robots would replace humans because it’s not an easy job. We see a lot of delivery man on bike on cities and it’s very dangerous because the cars don’t pay attention and delivery men drive very fast, there are often accidents. Whereas delivery robots don’t get tired and if there is an accident, it would be less serious. The robots could be equipped with cameras to have a vision from all angles, which would limit accidents. They wouldn’t fear the cold either and could work non-stop day and night until having to be recharged in battery. We could even imagine robots moving in the air so as not to disturb traffic. They would move along cables like electric cables or or flying, it would be drones. The delivery time would then be much faster and it would surely cost less.