All of those facts are pretty accurate, but there is one element of the story that is often left out, and it has a lot to do with why the music business can't get back to its prior levels of revenue. Record companies were primarily in the business of selling albums -- groups of 10 or 12 songs. Back in the "old" days, the normal price of an album was around $15.00, give or take a few bucks. That meant that the price per song was a dollar or two -- much like it is now -- but the unit sale was much higher.
The magic in that model was that a record company could promote one good song off the album, and consumers would have to buy the rest of them too. Think of it in another context. You're hungry for a hamburger, but you have to buy 11 fish sandwiches at the same time in order to get your hamburger. McDonalds would sell a lot of fish sandwiches that way, even if no one really liked fish sandwiches.
In reality, with the retail price of a recorded song about where it's always been, the gross profit margin is actually higher. There are no manufacturing, shipping or co-op placement fees. Same revenue, lower costs -- that means more gross profit to go around. But the problem is that this new model of distribution doesn't let the record company sell a bunch of fish sandwiches along with the burger.
With the demise of the DVD, there is a real fear that the film business will face the same sort of irretrievable decline in revenue from the home entertainment division. While the problems of illegal copies and piracy are certainly a similar challenge, the film industry isn't faced with a prior business model that had them selling 10 or 12 movies per disc. So as film distribution moves from discs to digital downloads and streaming, film distributors are still going to be selling in the same units as before -- one film at a time. And all of the economic efficiencies of digital distribution should work in the same way to actually increase the profit margins.
I understand there are many other factors in play. Films are expensive to make (although less expensive than they used to be), and there might still be a perceived value issue where consumers won't pay as much for a download or stream as they will for a disc. However, with all of that said, at least the film guys aren't trying to reclaim a business model where most of their sales were from products that no one ever really wanted to buy.