An interesting article, thanks for posting.
For myself nothing has changed. I never bought anything with intent of resale. I have given plenty of books away to friends in the past but never sold any.
What does bother me is that we are charged as much, and sometimes more, for an eBook when we are not really buying it. If there weren't so many legal freebies offered I would feel ripped off.
With music I don't mind the cost so much as I will listen to a song many more times than I will read a book.