I recall some research in the TV age. They observed, if the subject is looking into a light source, (be it a camp fire, a screen or a bulb) they go into a kind of sleepwalking mode. They also mentioned the phenomenon was already well documented by hypnotists.
In the early internet days I couldn't help but notice people who read zero books now spend the whole day reading.
I think it means the tool is used the wrong way? Interactive should be e-paper or real paper. Dull cramming or basic reading skills would be a good fit for glowing displays.
Perhaps we even need a device that can do both.
You also don't get the physicality as part of recall with eInk over real books. When reading technical books, as an example, I often would look back when going to review something based on where it was physically in the book... I completely lose that with ebooks.. I still mostly use ebooks and online docs these days all the same because moving hundreds of pounds of books when you move sucks.