Nicholas Negroponte: Books will be Gone by 2015

Nicholas Negroponte, interviewed on CNN, makes the bold claim that (physical) books will be gone by 2015. I am supposing that he means more precisely that at some point in the near future, books will be more read and browsed as digital resources than as print on paper objects. To sharpen up the prediction, in which year will we see the switch over point, when more books are read on a digital medium than in Gutenberg-style print on paper? Will the big switch-over from physical books to digital books take place in:

2014 Negroponte is being cautious
2015 Negroponte is spot on
2016
2017
2018
2019
2020
2021
2022 Hard to see this far out
Later Negroponte is talking through his hat!

To take part in this poll go here (Condorcet Internet Voting Service). Results and some comments will be posted on this blog at a later date.