Linda is absolutely correct as far as what practices will have to do to respond to the ACA. My opinion was regarding the word "boon". You would think that with more people having insurance that would mean that more people will get to go to the doctor when they need to. But read your policies closely, it's not "free" to go to the doctor even with the new policies. There is still deductible and co-pay to pay, and offices are going to want that payment when you go in.
I can only speak to what's happening in our area, but it's getting really difficult to even get a doctor to take someone as a patient. They will look at your case and decide if they want to take it on. (personally I think that's wrong, but there is professional liability involved in every case they take on and ultimately it's the doctor's butt on the line) Many of our Medicare primary doctors have gone to a clinic (so the patient is part of the clinic and not necessarily the doctor's patient) and it's months before you can get an appointment. And specialties are even worse. If you're really sick, now, today, you have to go to the ER or Urgent care. How the government thinks that's going to make things better is beyond me.