I find both experiences unpleasant, although in different ways. Of course, it may all be enculturation, but the effect is real. When reading e-ink or lcd displays, after a time I just feel compelled to put it down and do something else. When reading a book, I often find that time has just gone, and the only reason to stop is that there is something else that needs doing.

I agree entirely that the convenience of having 6M books at hand and ready to go at a moments notice is phenomenal, and sometimes I succumb to that argument. For me, the medium then just kills reading for pleasure stone dead, and it becomes "read only if you must."

The Kindle is a little weird to me. I have one and I've read a fair amount of books on it, but it's not as pleasant as a paper book.

Books aren't going anywhere in the foreseeable future. You can't pick up the latest bestseller on sale in the supermarket, you can't give your e-books to friends an family when you're done with it. And some simply find them easier or more pleasant to read.