Regarding Kindle, etc. I have a Kindle and like it very much. However, just yesterday I read an article in regard to a control group of college students. Many did not like the reader because they couldn't write in margins, highlight, take notes in their accustomed way.
Now, I am not a student, but those are the same things I find lacking when using the Kindle. While there is a way to highlight and take notes, it is inconvenient, and not handy.
Newer versions of Kindle type readers (Samsung) might figure a way to accommodate these things.