B&N and Borders going out of business is just one of the possible results of the recent Walmart pricing strategy ($8.99 hardcover) for their top 10 bestsellers.
So what happens next?
It seems pretty obvious that if these two chains go out of business then every publisher will be dramatically cutting their list. How many book titles does Walmart sell in a store? 100? There's no way publishers could publish the number of titles they do today if B&N and Borders brick & mortar stores didn't exist.