I work in a warehouse full of them, I see them more often than I see my own family. They do one thing well, but still require human intervention at times and still run into each other now and again.

Other facility jobs, like picking and stowing, run up against vision and fine motor skill problems that turn out to be really difficult for AI and robotics to solve. They'll be automated eventually, but I don't think it will be soon. I might be wrong, though.