E-book readers that I've looked at have quite nice, paper-like, displays. So for me, the display is no longer a problem. No, for me the problem is format portability. Paper books will never break down, be discontinued, run out of batteries or anything else of the sort.

I'm not going to drop $300 on a fancy e-reader and then lock myself into buying books that can only be read on that device. Maybe if they started including them with print-books as a value-add or in a more open format, then I might eventually take an interest.