First, I read alot of ebooks, and have owned a nook, a kindle paperwhite, and moonreader on a tablet.
But I still prefer books because:
1. Reading stuff with diagrams (popular science books)
2. Borrowing books (A family member says: I just finshed reading XYZ, would you like to read it?)
3a. Passing a book I've read to my wife who doesn't own a kindle without having to give her my actual kindle, and without forcing her to read it on her tiny phone screen.
3b ... from my wife ... without buying it again on my kindle
3. Tour books (I love lonely planet), because of maps, and because it's faster to turn pages on a subway then pulling out ebooks
4. Reading magazines (Try reading National Geographic on an ebook. While you can technincally do it, the experience is greatly inferior)
5. My mother-tongue is not spoken by many people, and is not supported on most ereaders. (I still read alot in English though)
6. Reading for my *small* children. (There are 50 reasons why basing child reading on tablets/ereaders is a bad idea)
6a. They can more readily choose from a book-shelf then an app
6b. They recieve alot of books as gifts
6c. Child a likes to hold her book in her hand as she is waiting for me to finish reading a book for her sister
6d. Sometimes at around the age of 2, they like to destroy books, so I'm not going to leave them alone with it
7. Comics, I like to read comics, some of which are indie, and not on ebooks, and most of which do not look as good on a tablet. (I wouldn't even think of reading them on E-Ink)
Solve these issues, and I'll gladly stop owning books. However, ebooks have been around for a decade, and these problems have not been solved in a fashion which is satisfactory to me. That being said, for english fiction, I do alot of reading in ebooks.