Some of the best books I’ve read in my life, I picked up almost randomly in a store - maybe they were highlighted by employees, maybe they had a particularly nice cover or backcover... that feeling of having discovered a gem on my own, or the fun of spending an hour browsing dozens of books to find The One, maybe talking about it with friends or employees, is so satisfying that it keeps me going back.
The online experience is severely lacking, imho. Maybe it will be different for generations that grew up with Amazon, but to me the bookstore experience is superior. I think they are missing a trick by not allowing me to couple their experience of serendipitous discovery with the convenience of ebooks.