Ideally, I think everyone should own an e-reader, but also buy as many hard copy books as possible. (authormedia.com)
However, should the author or publisher choose to work with a book PR or book marketing firm, they will still need hard copy books for review purposes. (thecadencegrp.com)
I'm really keen to get a hard copy book as I find this much easier for cooking - my kindle is just black and white and I hate using it for recipes. (ketodietapp.com)