I think this is mostly price driven. The initial frenzy over Ebooks was the promise of volume - 2000 books on my Kindle! Which has faded as people realize that

I think this is mostly price driven. The initial frenzy over Ebooks was the promise of volume - 2000 books on my Kindle! Which has faded as people realize that it would cost $200,000 to fill the Kindle, and the result is far less useful/general-purpose than a printed book (no loans, sales, requires battery, lasts shorter amount of time)