I feel that you're reiterating your personal preference for the "experience" of holding/writing in a paper book rather than making an objective prediction about when and whether e-books will ultimately replace paper. Why are you insulting me with this "I don't need to explain myself because I'm obviously right" tone? You're emulating Brody and Molotov? The Bulb isn't who I thought he was. He has sided with elitism instead of exchange of ideas.
Three sentences would do. You could say, "2020 is likely too early to completely switch to e-books. The technology needs further improvements in visual clarity, writability, wireless transferability, and general ease of use. Logistically, it will take a long time to make every book available, and the change will be resisted by the anti-technology subculture as well as Barnes & Noble."
I would reply, "Excellent post; I agree that 2020 is probably too early. But, my greater goal in that post was to raise the idea that paper books may become a thing of the past in the not-so-distant future rather than predict precisely when it will happen."
I don't think paper books are ever going to become a thing of the past. No matter how much the technology improves, no e-book reader thing will ever be able to fully capture or replicate all the various inherent qualities that make reading actual books a unique experience. You can't give a dogeared e-book to your friends or write notes in its margins. You can't line nice mahogany shelves with e-books. Call me a book fetishist or part of "the anti-technology subculture" or whatever, but I simply don't see paper books ever become obsolete.