Deliveries use hands because humans have hands, not because hands are a prerequisite for deliveries. Last mile is already “solved” with the little robots that drive around cities, no need for hands. Humans are useful because of our brains, because we can adapt to almost any situation for very little cost. Humanoid robots will remain a novelty until the cost is reduced far beyond what is plausible.

How do we define common? I’ll bet that in 5 years, the average person, even in somewhere like SF, will not see a humanoid robot during their every day life.