I also use my Kindle for reading fiction, but not for non-fiction.

My holdup with non-fiction is that I find that the experience of reading a physical book helps me learn more effectively. I can write in the margins, underline, and dog ear pages. I can flip back and forth to reference previous chapters or notes, based on the visual cue of those markings and folds. And all of these books are mine forever, for me to reference years later.

I’m sure eBook readers will continue to get better and better, but for non-fiction books I plan to reference in the future, a physical book will be hard experience for eBook readers to beat.