One way to dream up post-book media to make reading more effective and meaningful is to systematize "expert" practices (e.g. How to Read a Book), so more people can do them, more reliably and more cheaply. But… the most erudite people I know don't actually do those things!
I also wonder about your thoughts if you compare to strategies and processes that struggling readers use in grades 4-12. e.g. …https://prod-hmhco-vmg-craftcms-private.s3.amazonaws.com/documents/READ-180-Universal-Evidence-and-Efficacy-Natl-2015-1.pdf?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAJMFIFLXXFP4CBPDA%2F20191230%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20191230T065540Z&X-Amz-SignedHeaders=host&X-Amz-Expires=3600&X-Amz-Signature=87058ed58a980f54ec1fd9e83835dd87761fa4f2f2dc02b9fbf746ae782c648c … bc, if a struggling reader becomes a reader, do they keep these strategies? If not, how would they describe their process now?