For what I understand the new drywall gun is triggered by contact with the wall which is pretty cool and would save big time on battery life as normally you lock the trigger on a screwgun which is fine on a corded but for a cordless it's a battery killer.
Besides that having a magazine on a low speed drill like the C15 would be pointless, the whole point of collated is speed, the new PDC has the speed but I'd wonder about the weight as a hanger would be going through thousands of screws and a heavy drill would be no good.