I particularly agree with McArdle's point:
The bigger problem is that while Borders lets me find things I'm not looking for, Amazon always lets me find the things that I am. In the good old days of local bookstores, I frequently went without books that I knew I wanted, because it was such a pain in the butt to order them. Now if I know I want to read a book, I can do so in short order. Ultimately, this is a bigger boon than the occasional undiscovered gem -- particularly since there are still libraries...I might miss my local Borders. But as an avid reader, I'm glad to be living in the Amazon era.