It's a really interesting question that I think everyone is asking about everything that exists. Shows, theaters, circus performances, sporting events etc. It's unchartered territory, nobody really knows. If I had have an opinion about it, with time everything will go back to close of what we perceive as near normal. I am a New Yorker who has seen 9/11, the effect to the city and the subsequent return to normal that we were always bound to go back to.
Eventually people get tired of the inconvenience of something and relax. Of course 9/11 permanently affected things like air travel security, but on a day-to-day here in NYC, eventually everyone decided well we're a terrorist target, we could die at the office today but we have work to do. So personally, I've learned to adapt to these things. I think eventually ready or not people will go back to normal, including Disney.
I imagine hand sanitizers and an overall conscientiousness of cleanliness will be in the minds of many going forward. There'll be free ones around Disney, and you know who knows maybe hand sanitizers will be the hottest Disney themed merch at the parks. I think people will opt to use masks more often, I don't think that will work as a mandatory experience at Disney World. In fact, I actually would opt not to go because I can't stand it here nevermind in 90 degree Florida heat and I don't think I'm alone in that.
I wouldn't be totally surprised if Disney used this as an opportunity to (maybe permanently?) cut / reduce shows and character interactions without seeming as a cost cutting measure as I think a lot of people will understand that for at least a year after the pandemic quiets down some. That doesn't sound like the happiest place on earth to me, but I do think it will eventually return to a semblance of normal, I'm just unsure of when.
But my guess is just as valid as anyone else's and I'm very curious to see what happens!