As a GA and professional pilot, I think widespread use of drones of all shapes and sizes is inevitable. I also think that routing and collision avoidance will be sorted out to the satisfaction of other airspace users, eventually.
It’s not only urgent supplies of whatever, it’s normal stuff too. Instead of white vans screaming through villages throwing fragile parcels over hedges (I’m talking about you, Hermes...), a high-capacity drone, or droneship with multiple drones, taking stuff straight to the customer from the warehouse seems like a more efficient and greener way to do things.