There is another advantage to "real" reading that other replies haven't mentioned: a good book is well crafted language, and by absorbing the author's eloquence

There is another advantage to "real" reading that other replies haven't mentioned: a good book is well crafted language, and by absorbing the author's eloquence – by savouring his/her metaphors and lexicon and wit and style – you, over time, grow more articulate as well. It's soylent vs three-star fine dining; both have their rightful place, and neither can fully replace the other.