I'm almost against digital readers for one simple reason: technology evolves. I love to read. On average, I read about one novel every 2 weeks. So I would definitely benefit from a digital reader. But 10 or 15 years down the line, all those books that you bought for the kindle will be obsolete, because either the battery will start to slowly die (and they won't make the same ones by then), or a totally different technology will come along to replace it.
Same with DVDs. People spent hundreds of dollars on DVDs and now they are all being replaced by blu-ray. In a few years, no one will be releasing DVDs anymore, just as VHSs are no longer around. And I don't like the idea of paying (often full price!) for ebooks when I won't be able to make use of them forever. At least with physical books, you can get them on sale or much cheaper from a private seller or the internet. There isn't much competition with ebooks because there are so few platforms.