I don't miss physical books in the slightest, I'm interested in the message not the medium.
While I agree with you that the content is the most important aspect of reading I also appreciate the presentation and aesthetics. It's the whole package with me and my reading habits. Going to my bookshelves and choosing which book to read, the feel of the book in my hands and the area of my house that is my reading space. All these things contribute to my reading enjoyment and taking away the physical book just seems to diminish that enjoyment. I am certainly not against anyone else using e-readers but I plan to hold out as long as possible
