Apple will only open APIs a little, because "the customer pays us to make some of these choices on their behalf"
In response to a question from the audience, Cook said, "I think you will see us open up more in the future, but not to the degree that we put the customer at risk of having a bad experience." This means that Apple will allow developers deeper access to APIs, and could even open up iOS to more customization in the form of alternative keyboards.
Of course, while we expect there will be some rage spewed on the Internet over Cook's comments, the fact is that he's telling the truth. As much as Android fans may praise the platform for its abundance of choice, some users simply don't want to make that many decisions. Some users want a device that doesn't have as many options, because the learning curve isn't as steep, and the functionality is good enough. It's all a matter of opinion, and personal preference. Fanboys may forget, but one of the choices Android offers is to not choose Android at all.