I read the blog about the advantages of Logos and I totally agree. But paper has one big advantage: you can give or lend your books to someone else. if I read a good book, I want to share it, also with people who are not willing to buy the book themselves. And when someone really needs a book I own but never use, I would like to be able to give it to him.
It would be awesome if Logos could find a solution for that (maybe something for Logo 5?)
ohw I would like to add an advantage of Logos: the books don't take to much space :P