Apps on the App Store aren't cheap enough?
It's a bit of a strange area, which I guess is why the case was dismissed. Yes, app-makers compete against each other and therefore set prices accordingly, but through it all Apple is merrily taking their 30% cut.
The issue really is that there is no option to use a different App Store that maybe only takes a 20% cut, but the issue isn't for the end-users, but for the developers trying to sell their apps, as 30% is a pretty big slice.
Problem is whether this prevents competition, which it sort of doesn't (though you sometimes wonder given the strange rules the App Store adheres to). There is also various content that Apple's App Store doesn't encourage but that another App Store might, so it does remove an element of user choice as Apps that Apple refuse to carry could be made available by another App Store, if you're willing to trust them but currently that's impossible, so if Apple won't carry it, neither can any of their customers.
The other issue is that other companies with app stores could easily port these to iOS, but Apple is explicitly preventing this. So while they're not preventing competition in the general sense, they're preventing competition in several areas nonetheless, but I'm not sure current anti-competitive laws adequately cover these.
While I don't like the continual legal action being taken against Apple over frivolous things, this is one of those areas where I think that Apple really
should lose, as opening up the platform to at least have the
option of using other stores would be a good thing. It means Apple would have more reason to compete not just in terms of ease-of-use for users by offering currently restricted content and making things even easier overall, but also in how they interact with developers to make approval easier and more transparent, maybe even reduce their cut, at least for the less expensive apps anyway. There are tons of areas that Apple really needs to improve with the App Store, but there is currently no incentive to do so which is why the store improves only very slowly.
I don't
want to have to use other stores, but when Apple's is the only choice the only way to vote with your money is to switch to a completely different platform, and that's not something you can really expect people to do. This is one of those prime areas where legal action is needed to change things.