Have retailers made it too easy to buy online thus creating Borders' downfall?

I'm sure everyone by now has heard about the Borders chain going bankrupt and they decided to close quite a few stores across the country.  I've never actually walked into a Borders store, usually making the local Barnes & Noble my point of destination.  Perhaps if a Borders had been built near us instead of Barnes & Noble, Borders would have been the place I would have gone to do my book browsing.

However, when you think about it, I have been in our local Barnes & Noble once i...