J-P, the questions you ask regarding paper books generally provoke tons of (let's say) vigorous discourse in my field. I could definitely imagine a future in which owning paper books becomes a luxury, a electronic books and their attendant devices drop in price. Just as it is now a luxury to own a horse for now good reason. (Also heavy.)
I believe that the codex (even if not made with paper) will and should endure, but that we'll use it differently, perhaps with more respect or shared ownership within a community. Codices resist change and censorship more easily than electronic documents do. The paper book signifies a drain to our environment, but how does that compare to the environmental impact of producing, distributing, and recycling electronic devices and the infrastructure that they require? (That might be an unanswerable question at this point.)
What I do know is that many codices are beautiful in themselves. As are those luxury horses. (But with less poop.)
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And now a question regarding my own crappy paperback codices: Does anyone know how to get one's paperbacks re-covered to make them hardbacks? Most of our books are paperbacks, and I like to imagine them as cloth-covered hardbacks, in a range of colors. As a child, I lusted after the huge library of leather-bound books that belonged to one of my father's colleagues. They had a pleasing uniformity of size and color, with exotic names on their spines, like "Seneca" (an Indian chief?) and "Cato the Elder." Now I know I don't want any leather books or the authors in their canon. But it's really cool to think of a cloth-covered canon of our own. So if any of you people know where I could get this done, or anyone on Etsy who would do it, please let me know.