> The variety in Walmart’s DVD bin is seemingly endless: and for a price of about $5 per disc that you can hang onto forever, you can’t really go wrong.

Am I the only one who thinks that this premise is flawed? DVDs, like any physical storage medium, have a limited lease on life. If I was serious enough about movies to go into a store and pick them by hand, the first thing in would do is to create a digital backup. And when you already have a social copy, why not just watch that one instead?