Totally anecdotal story / corner case:

I was a terrible reader growing up, I had ADD before the days when they diagnosed that.

My son also has ADD and strangely, he is an avid reader. I've caught him reading two books at once (both in his lap) and swapping between them and he was comprehending them (I did some Q&A).

At least on the very surface to me that might mean that reading is not necessarily antithetical to someone who is prone to distraction / lack of focus .... or a distraction heavy world.

We've seen history full of predictions what the phone, or video games, or computers would do to seemingly related technologies, and not been good at predicting the result.