[shuntress]

The term they should be able to fulfill is natural interaction with a humans.

You should be able to crawl into your car and sputter "take me cough to the hospital" to which the car vocally responds "Right away" then drives itself to the hospital.

edit: Meaning, this interaction should play out exactly the same as if you had a full time driver/butler whos only job is to sit in the driver seat of your car and wait for your commands.