It's exactly that - ADHD audience. Alien: Covenant is the Alien made for millennials, in every sense of the world - it's a soft-reboot-disguised-as-a-sequel-to-a-prequel based on the same old story line with the same shock elements - the facehugger, the chestburster, the xenomorph. And just look how much poorer it is as a story and a movie. It's not even horror, just an action flick.
Same with Blade Runner - the original is presented as a linear noir story with psychological backbone, but has many beautiful layers to unwrap, and the way it is delivered still makes me, a 44 year old guy, sweat under my eye lids a little every single time I see it.
If it were made today, as a sci-fi flick the audience wouldn't have any of that stoic plot ambiguity - Nexus humanoid escapees would be expected to buldoze half of the city, preferably full of recognisable, iconic locations and Deckard would have to face at least two dozen of them across 90 minutes to reach the final twist point. Each duel would be announced with modern techno pounding soundtrack equivalent to shark arrival in Jaws. There wouldn't be any schmantsy-pantsy origami unicorn hints - the main character would know straight away, beyond any doubt that he himself is most definitely a replicant. And instead of lofty philosophical linguistic gymnastics about c-beams glittering in the dark off the shoulder of Orion and similar trivia, any twists and turns would be delivered to him as a word for word smug monologue by a final in-game boss like villain, in a language so plain and repetitive that even the guy who fell asleep at the screening would carry that one message out of the cinema with unfinished cup of pop corn, even if he missed everything else in the movie. There would be no ifs or buts, no untolds or unspokens, just plain and simple love story with many action fight scenes. Am I right about it - we'll find out on 5th of November.