You only have to compare the way paragraphs are structured on Urban compared with a book to understand the differenced between the media. Print-length paragraphs are *difficult* when read off a screen.
On my journey home, incidentally, I've been reading a first-edition Asimov that I managed to pick up in New York. There are intangible pleasures that can be gained from physical forms too. If yer know what I mean, fnarr.