Not really, I think Apple have just realised they have a body of legal advice that suggests that they were massively in breach of EU competition law and potentially US competition law as well.
They don't want to do this, but it's much better than the alternative likely remedy if they lose such a case, which is a massive fine and not being allowed to run the only iPhone app store any more (I'd think the EU would go for something like the Microsoft browser ballot - you're offered five app stores upon first setting up the phone and get to pick a default).
Compared to the loss of control they'd suffer from that, Apple are just trying to maintain as much as a monopoly as they can pragmatically by trying to reduce their most damning practices.
Phazer