This is as old as the hills. A business has an incredibly difficult time cannibalizing a line of business that is profitable. And the music, television, gaming and movie businesses are very profitable.
The music business got lucky with Apple and iTunes. But this caused the TV and movie industry to get upset about having to a) give a cut to another middleman and b) reduce prices.
So piracy will continue until either the businesses stumble into a solution, or someone comes along and disrupts them.
And despite the wailing and teeth gnashing about DRM in the tech blogosphere, I'm not convinced that the public is truly concerned about this to the extent that techies are.