They'll centralize and monopolize yet another middleman's dream and create the physical Internet, with vast opportunities for rent seeking and wealth extraction.
You will not own the trucks: They'll be rented to you, you won't be able to repair them. If they malfunction, you'll have to talk to some centralized Email or "AI" based customer "service".
Somehow, the monopolists will extract as much money as you previously spent on a driver.
It may not be a monopoly in the beginning, but it will consolidate to at least an oligopoly soon.