My tweet on the matter may have been too subtle:
In other news, most restaurants still don’t want you bringing in food from other restaurants to eat there.
And obviously over-simplified. But the core concept is intact. If you’re going to consume content on their device, Apple would prefer that you buy that content from them and not from a competitor.
Or if you do buy want to buy it from the competitor, that’s okay, but then there’s a corkage fee. Only you don’t pay the corkage fee, the competitor does. (Well, unless they pass off the extra cost to you.)
Can you read iBooks on the Kindle? What about Sony’s books? Nope.
It’s neither complicated nor evil. It’s business.