I would imagine these are for the case where the patient can't get to the doctor's office frequently. Whether this raise privacy concerns would be open for interpretation.
Or for follow-ups. I had an appointment with a specialist this last Monday. She prescribed some stuff, said to call back or come in (if necessary) in two weeks. What if I could Skype for five minutes and say how things are going, maybe show the affected area of my body on the camera for a quick look. Saves time all around. Then if I really do need to come in for a personal visit, we can schedule that.
Seems that often enough I just want to talk with a physician and do not necessarily need the hassle of driving there just to talk face to face. Yeah there are plenty of times I need to show up in person too, but this could be one more tool to save time and energy. I miss less work (or stay less late to make up the time), the physician gets to see more patients. It could be a win all around.