Sanitation ninjas can't be far off. You'll think you're in the clear and drop that wrapper...
Depending on where you live and how involved unions are, they already have trash trucks that do not require a human to pick up the garbage. The driver activates a mechanical arm as it picks stuff up.
Unions will be the problem with a lot of the robotic implementations.
Going from one human to zero humans has a large impact on who's responsible for any screw-ups. I'm not sure the insurance will make it worth it to either the manufacturers or the operators anytime soon.