As much as I agree with you, I find that the ability to run a grep (or the more commont Ctrl+F) to quickly look for what I'm looking for of very high value. I usually enjoy reading the book from front to cover, but as soon as I want to consult it again for reference, I am happy to have the computer do the search work for me.

Other than that, I often read on the (crowded) subway ride to work. Carrying a 600 page book is often a pain in the ass, compared to the lightweight feeling of my Kindle.

On the other hand, I completely relate to the pleasure of the physical page. I also enjoy very much watching my collection of books slowly expand on my shelves.

I wish there were a model where buying a physical copy of the book would entitle you to the digital one or vice-versa. I think both have their advantages in different situations.