I have been thinking about this in the context of my own reading habits and how they have changed over time.
I have read textbooks with a lot of patience spending way more time per page, letting the content sink in, thinking about it, taking notes on the bitsy corners of the book etc. However, these days as a professional, when I read tech books, I could see myself rushing for facts, and "how-to"s instead of deeper reading. May be I'm getting older? Wiser? Falling into Attention Deficit Disorder? I don't know. But, I do know that if a tech book does "8,4,2,1,2,8,2,3,1,4" like you said, I'm lost at third step, finding something else where I can get my facts quick...
This is where interactive books could jump in and help keep the attention in place with more relevant information in view instead of needing repetition.
I remember Apple tried something with a free app called iBooks Author. I need to spend more time with it and see if I can make use of it for some tech stuff.