There is something satisfying about pulling out my phone and using it as a book. On the other hand, there is also something satisfying about flipping through the pages of a real book. I like to smell my books as I read them, bringing the pages close and fanning them so that the air blows over my face. I revel in the smell of the paper, the ink, and the glue that holds everything together. I'll never be able to get that out of my phone.
I will probably buy a real Kindle just because it is larger and the screen is designed to approximate a real book more closely. But I don't suppose that electronic readers will ever replace all of my books. There is too much of an emotional connection there.