I'm actually shocked to think about how few new books, period, I buy these days. I contribute to the problem, too, but more by being chiefly interested in older and out-of-print books, things in general that are rather harder to find, and which won't be found in any event in a Barnes and Noble store.
Can it be, though, that BK's books are just about the only NEW BOOKS I've bought over the past couple of years? Well, just about.
Here's where Barnes and Noble is valuable to me: I drop a TON of cash and plastic there at least twice a year on Blu-rays and DVDs ... led by Criterions during the sales, but I'm nearly always able to find more to add to the pile because ... it's a store, and being able to browse and discover things results in more sales.