Agree, hard to go back to paper once you taste the convenience of e-readers. My main grievance with e-paper readers is that it's really not practical to take notes or to highlight stuff in books - sometimes the selection is just awkward, and typing is very slow. Another issue is that you can't have your books sitting around for everyone to look at like in a bookshelf. I think this is somewhat damaging because I discovered a lot of books I would have never read just by looking at other people's bookshelves. In the digital era this is just not as easy to do, and recommendations tend to show you what people like yourself like, but its not the same, and bookshelves can be good conversation starters too.

But apart from what I described, E-readers pretty much win on everything else.