Remember - Disney is "the leader" in the Orlando area. They charge more for admission, and then others follow, not the other way around. So if Universal charges $12-20/day for parking, Disney isn't going to follow, they are going to lead - $30/day for parking. (*DI$ mic drop*)
They've wanted people basically captive on-property for years, ever since they introduced Magical Express. That will remain "free", though, it will just be part of the TBA resort fee, under "Complimentary Disney Transportation". And let's be honest, any costs associated with it were always baked into your room price. Just don't expect room rates to drop much when they implement the resort fee. And I could easily see Disney banning Uber and Lyft, essentially, by not allowing them thru the security gates, both at the parks and at the resorts. I'm not saying they for certain will, I'm just saying I can see them doing it. Why? Because...
This no longer my father's Disney, it is not the Disney of my childhood/20's/30's, and it sure as hell isn't Walt Disney's Disney. It's now just a bunch of cutthroat MBA's completely beholden to Wall Street analysts and large shareholders who view guests as nothing more than walking ATM's, and their goal is to extract as much money from those ATM's as they can. If they can make more money by banning ride-sharing services, they will do it. And a captive audience is a money-making audience. If you can't go off-site, then all your money has to be spent on-property. It's all about the brand, now, remember? It's no longer THE Walt Disney World Resort, it's Walt Disney World Resort. It's not THE Magic Kingdom, it's Magic Kingdom Park. And I, for one, HATE that, it makes me vomit in my mouth a little every time I see or hear it.
Now, that being said... Resort fees? Count on them, eventually, as sure as the sun will rise in the east and set in the west. People can look at this thru Disney-colored MAGICAL!!! glasses or look at this thru the view from reality. But either way, they are going to happen, it's only a matter of when. It's a multi-multi-million dollar annual revenue stream with minimal expenditures required, and TWDC & TDO have shown an unending desire for those types of things. End of story.
Edit: Fixed some spelling mistakes.