Have you heard of “pedestrian controlled” trucks? They’re increasingly common.

They’re small (carry maybe half a ton of cargo max) and you just grab them by a handle and pull them, they follow wherever you take them and you can be extremely precise with their position. Often there’s a lifting function (to load cargo onto/off of tall shelves or stack cargo on top of each other on the floor), and some can be setup as a train.

You’re not always limited to walking speed, some of them have a platform the operator can stand on to increase the speed.

I could totally see those increasing in size, to the size of a full size shipping container maybe, and having a wireless control system instead of needing to stand right next to it (which could be dangerous). It’d have sensors prevent the operator from running into anything and the control would just be a pair of joysticks. Outside of the loading dock of a building, they’d be able to drive autonomously.