I think it will be both. They will start with software for doctors - who will use it because the computer never forgets to ask some critical question that could discover a 1 in a million disease and not the common cold (with similar symptoms) that the everyone else in the office today has.

Eventually urgent cares and ER will install them for people directly. No reason the machine can't prescribe antibiotics for the latest form of strep that is going around. That leaves the doctor for the hard cases where the machine doesn't know.