I think the market will become saturated. Orlando just can't scale enough. Most of the theme park jobs are service jobs that don't pay well. There's only so much of a market for that kind of work. Right now, we're seeing Disney + Universal start to have difficulty hiring. If Universal's tourism goes up 50% (without impacting Disney), that's a lot of new people coming to Orlando. That means a lot of new hotels, new restaurants, new shopping, etc for those people to use/visit. There just isn't enough workers to support that.
It's tough to say what will happen on the infrastructure front and employment fronts; Orlando's still a pretty fast growing metro and the influx of people from Puerto Rico (north of 200,000) should help to prevent short-term issues.
I do think Universal and Disney can continue to drive demand for vacations in that market with the massive upgrades planned.
Let's just assume that foreign visitation to Orlando will grow in parallel to the growth of the theme parks: The latest numbers for 2016 Orlando visitation is 68 million visitors with OIA having 42 million airline passenger arrivals.
2016 (from TEA/AECOM, yeah I know they're not great estimates, but for percentage increases these numbers are useful)
Disney
MK: 20.4 million
Epcot: 11.7 million
AK: 10.8 million
DHS: 10.8 million
Universal
USF: 10 million
IoA: 9.4 million
SeaWorld
SWO: 4.4 million
Let's just use those numbers (ignore the water parks for now since we're just using percentage increases and those don't really matter for this calculation).
So 2016 theme park visitors in aggregate among the 3 operators = 77.5 million (the number of aggregate park entries basically)
Okay now fast forward to 2040 (this is the "
Highest Growth Scenario" in my opinion):
Disney (expansions go well and DHS becomes the 2nd most popular behind Star Wars Land/Toy Story Land)
MK: 22 million
Epcot: 15 million
AK: 14 million
DHS: 16 million
Universal (Park #3 does so well, so quickly, that they greenlight a 4th dry park by 2030-2035 + dramatic increase in hotel rooms creates huge increases across the board)
USF: 15 million
IoA: 14 million
Park #3: 14 million
Park #4: 12 million
SeaWorld (reorganize their finances, and manage to solidify themselves as a cost effective regional alternative)
SWO: 6 million
"Highest Growth Scenario": So 2040 theme park visitors in aggregate among the 3 operators = 128 million (the number of aggregate park entries basically)
Okay, that's basically a 65% increase from 2016.
A 65% increase in overall visitation means Orlando would get 112.2 million visitors with OIA having 69 million airline passenger arrivals in 2040.
Basically yes, there would need to be dramatic increases in infrastructure to account for those things, but a lot will change between now and then as others have mentioned. Driver-less cars and things like that will all be in place by 2040, and there will likely be other changes that we can't really imagine at the current point in time.
I would just use that 2040 "Highest Growth Scenario" to show that if both Disney and Universal grow to their maximum what the total numbers would look like for visitation and airline arrivals in Orlando.