When I upgraded Kindles, I had to go without one for a little while after I sold the old one. There was a book I wanted to read at the time, so I picked up a mass-market paperback of it. I found that I preferred reading on the Kindle in almost every way. It's more comfortable to hold, you can make the text bigger, and you don't have to move it around when you change pages (related:
http://blog.xkcd.com/2009/04/13/the-pursuit-of-laziness/).
So then I hear people say things along the lines of "Sure ebooks have their advantages, but a physical book just feels better". They often make it sound like everybody either agrees with them or is indifferent, but this isn't the case.
Ebooks are cheaper to distribute than physical books. They are easier to carry around (thanks to the Kindle synchronization service, I _always_ have my book with me, because I always have my phone). The barrier to entry is lower, so we get to see books that wouldn't have, otherwise. Sure, a lot of it's crap, but most of everything is. We get some good stuff, too. The increased convenience and available gets many people (myself included) to read more. Moreover, some people, like me, just like it better.
Then I hear people say that the impending supremacy (in the sense of popularity) of ebooks over physical books is a catastrophe?
What?
More people are going to read more books, more often, more easily, and this is a tragedy? Really? How is this not excellent? How is this not wonderful?
Besides, physical books will still exist. LPs weren't killed by CDs, and they weren't even killed by digital music (although CDs might be, but nobody seems to care). Indeed, the fact that physical books will become a niche item probably means that they'll be higher quality (if more expensive) as people buy them for the binding, and not just for the book. Meanwhile, ebooks will enter the mainstream, and most people will be fine with them for most purposes. I'll wager dollars to donuts that the next generation won't really care.
The physical book is not dying. It's simply moving on to another stage of life. The book will be better off than it ever was.