FrontPageTech is missing the point. The DOJ is asserting that it is Apple's decision of vertical integration that is wrong. In short, everything that makes Apple, well, Apple is fundamentally flawed. It has nothing to do with it's features and everything to do with the exclusionary choices they made.
And don't forget, even Windows was forced to allow more 3rd party software and the expense of Microsoft's built-in options; IE< Windows Media Player, etc. This is no different than what MS was forced to do, and we all benefited.