I think -IMHO- in four years or so this discussion could be more relevant. Concentrating primarily on your worry about competition, Universal will have a third park very possibly open, and there is a realisation / admittance within Comcast Towers / Creative that the screens issue is a) very real and b) detrimental. This began to (finally) sink in during Fallon development, but by then it was too late to cancel that and F&F. The indifference from the general public, particularly to the latter, only cemented the opinion that "screenz is bad".
Screens will never be stopped to be used. I’d expect to see them more than 20/30 years ago. They offer so many advantages and the technology will only continue to progress. But I don’t think we will continue to see a plethora of "screen based” attractions at the expense of “physical”. I know of several attractions that Creative have developed that have minimal use of screens.
Falcon will primarily have screens. It’s the only way to do it. Escape will follow the Transformers model of having screens supplemented by physical sets to create an environment otherwise too costly and/or improbable to create. Rat will of course. UK might not. But they also have to learn (from River Journey in particular) that physical sets with screens embedded doesn’t get an automatic pass.
You have to perhaps travel back to the likes of Horizons where screens and projections supplemented physical sets - the perfect mix of media. And consider to what extent screens are actually screens. Do the projected clouds on the PotC cyc make it a screen? The silhouette projections of Splash? These are a perfect example of a complete mix of every media available making an attraction better, an addition not a distraction.