Whoops! I meant to get back to this comment earlier in the week!

Points one and two are right on. Text and books are much less platform dependant than more modern types of media. Thanks for extending my line of thought - and clairifying it too!

I think the overarching point I was trying to make, and hopefully made, was that publishers -- people who have a vested interest in sellling as many copies of some sort of media -- will always want to manage profitable distribution of their content. Currently that looks like DRM tied to a media platoform (with some exceptions like the Baen Free Library).

Consumers, on the other hand, want to buy once, consume anywhere - and that's the big challenge; two different perspectives on the same content-consumer ecosystem. It's going to be interesting to watch this shake down.