The closest I've come to an e-reader is my iPhone, which I'm using to enter this reply. It's not bad for reading books but not great either.
I do agree that e-readers are the future and at some point I will get one myself. There are more basic issues however.
1: How much do you read now vs when you were a kid? I have a nice collection of half finished and unopened books on my nightstand. Is it worth the money to have the same problem electronically when I can't finish what I've got now?
2: What about libraries for the ones that aren't keepers?
I do a fair bit of traveling, so it makes a lot of sense for me. As for libraries, here in BC most if not all of the libraries are on a provincial e-book lender system. Currently it does not support Kindle but does support e-pub and a couple of other formats. And just like any library, they have limited copies, so you may have to go on a waiting list. A borrowed book stays on you e-reader for 2 weeks, then disappears so it can be made available for someone else. No worries about late returns
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