I totally miss the browsing. However, I stopped reading long before I got an ereader because of vision loss. It was only because of the ereader that I was able to read again. I still go to Barnes & Noble for craft books. Most of the time though, it's in and out because I order stuff for pick up there. My browsing is online because I can READ IT there.
What I really miss browsing is Uncle Hugo's and Uncle Edgars (Hugo's specializes in Scifi and Edgars specializes in Thriller/mystery). I still go there a couple of times a year, but I struggle to read the back of the books. My sis makes up for it and buys $80 worth of books every time though. She still sticks with paperbacks and supplements with ereader.