If computing ability were to become as cheap and low-power as human/animal brains, you could have the full capacities of a present day dentist contained in the area of a present day powered tooth. Just make the bristles freely moving, add some hard pieces for plaque and you have a thing that could use that intelligence.

Which is to say, sure, today "AI" is just a marketing term but that's 'cause they don't have it, not because real intelligence isn't something that would be very useful in many, seemingly trivial places.