There's also the factor that some folks just
like bookstores. I enjoy going to the local B&N for an hour or two even when I'm pretty sure I
won't buy anything.
It's not something that
everyone would have to do for stores to continue, just enough folks to continue to make it viable.
They might have to continue to add other offerings ... perhaps the Book Store of the Future will be a glorified FourBuck's with some sort of electronic arrangement to allow browsing both 'shelves' and 'books,' who knows?