The printed word and the digital word are complimentary and one does not cancel out the other. Enough distinguishes them to allow peaceful co-existence, much like radio and television today. A lot depends on our ability to sustain the current high energy lifestyles most in the developed world enjoy. Some combination of the two will be in vogue going forward. Currently we have a love affair with the digital because it is new and shiny, but it's ability to be so readily edited over time and controlled is (in my personal view) it's biggest drawback. I'd like to see how readable a PDF is or indeed these very words in 300 years! Nothing beats a musty old library :)