Part of the problem is also that:

1. People who run major companies work insanely long hours, have no time for leisure, and as such most become incredibly out of touch with new trends and technologies (beyond their immediate sphere of activity). Even Steve Jobs was frankly incredibly out of touch with how many people wanted to use the iPhone, in its initial incarnation. You could tell, for example, that he didn't use it in bed (or he would have figured out the need for a screen rotation lock from the get go). Likely he slept few hours and simply didn't have time to do this.

2. They are so beholden to the reporting cycle and shareholders in terms of needing to constantly post increased profits that they are effectively forced to take a short term view

3. They still - as do many consumers - buy into the myth of "too big too fail"/so-big-must-be-eternal. I remember someone buying expensive Sony minidisc things after the first iPod came out (and bear in mind it was far from the first mp3 player).

With ebooks a good parallel is game downloads: they haven't killed the game industry, even though they've freed people from having to buy physical copies. And yet you still have bizarre anachronisms such as Xbox requiring not only a disc to be bought, but retained in the console during play (even after preloading).