From the way our technology in storage media is exponentially improving, I\'ve read that by 2015 we\'re going to have optical media the size of a CD that will have terabytes of storage.
The MPAA/Copywrighters are NOT happy about that though - One pirated MP3 disk of 2 terabytes could contain about a year\'s worth of music, for a cost of around $20 bucks!! A simmilar disk could contain virtually every book every written, in e-book form, again $20 bucks!
At the research center where my dad works, one of the groups is working on crystal storage as a medium. Right now it\'s too slow to be practical, but with a lazer and quartz, you can store thousands of petabytes, in a 1x1 cm piece of quartz (they write basically to each molecule in a lattice). Eventually, though they\'ll reach a level of size/quality, that you can decide to heavily invest in. There comes a point at which more quality isn\'t needed, because you won\'t notice it.