There is a simular thread over on Disboards but this post I think hits the nail with what the future will bring.
You are all missing the easiest one of all: ParkPass+
With paid Genie+ and LL, Disney can increase their revenue by adding or deleting ride capacity now. Theoretically, they could put a smaller amount of ride vehicles in service at park opening, drive up wait times, and then once people don't want to wait 3 hours in standby for Test Track, add capacity as more and more people pay the upcharge. Do you honestly think they are going to have all 3 Soarin' theaters open at 11am? Of course not if not enough people paid up that morning for Genie+, but they can bring the third one online after noon once standby exceeds over an hour and just have LL and Genie+ use that one while everyone else uses only 2.
So why wouldn't Disney do this with park reservations? "Trying to get into a park for a high demand day that has no more park passes available? With ParkPass+ added to your tickets, you can get into any park at any point of normal operating hours. You can even park hop before 2pm! Now you can access any Disney Park on any day, giving you more flexibility for your vacation!"
The brilliance of this for Cheapak is, just like with ride capacity, they can artificially inflate or decrease supply to increase demand, so people that have already purchased tickets, APs or MagicKeys but were shut out of a park reservation on NYE or the 4th due to artificial decreased supply can pay more to get one of the "limited supply" of ParkPass+ reservations available. They can limit Park reservations to say 70% of what they are now, and hold in reserve 30% more for people willing to pay for it. One way to decrease crowd capacity, but make people pay extra for the same things they used to get for free.
This would be the Holy Grail of Yield Managment.
Credit to Richard Bastien