I'm thinking the specifics may be this...book 120 days out and be guaranteed the best available rate, so we don't have to keep calling back and checking on rates.
That being said, I also hope they keep some sort of system similar to the current system. You see, we drive to WDW, and I allow an "extra day" on the road in case of car trouble or bad road/weather conditions. Being a DVC member, the only way I use the AP room discount is like this: if we know we are arriving a day early for our DVC ressie, we stop in Ocala and reserve the first night at a value resort using the AP discount. I have no problem paying the ressie in full at Ocala at the time of booking...but I do hope there will still be some "last minute" discounted ressies available.