From a comment posted in James Nicoll's LJ here.
What I want to know is whether authors are getting more royalties due to there being no way to pass DRM'd e-books on to additional readers the way you can pass on a paper book.
I have my doubts, but if it turned out to be true I would consider getting one of the e-book readers.
(I'm buying as few books as possible because I have absolutely no space left in my house for books. The ones that don't come off my to-read shelf, I get from the library.)