Richard's comment contains a decent argument, but it doesn't say anything about retailers' bottom lines, as the post suggested. It boils down to "all of the retailers made this fundamental change, so it must have improved their bottom lines." Maybe, but it's an implication at best.
And the extrapolation to the film industry is quite a leap. A bit easier to say, look, I can buy the Blu-Ray for $15 and sit through 5-10 minutes of previews and FBI warnings, or I can download it. Richard's getting at this, I think. The movie studios would most likely increase sales if customer purchases were belonged to the customers.
I agree. The collective attitude of the indignant commenters on the last Zookz post was based on the false premise that surely if I pay something for these downloads, the RIAA can't touch me. Foolishness.