Tim Cook Quizzed On The Possibility Of Opening Up iOS
Its not clear whether Cook is providing a direct response to the question or not, which makes discerning the meaning in his answer impossible. His answer is vague enough that it could just mean ‘adding more APIs for developers in the future’ (which is an inevitability) rather than adding more APIs for integration with Mossberg’s specific examples, like the keyboard and the home screen.
Personally, I would expect Apple to relax their control over iOS to a degree, but I think custom keyboards are out of bounds. I think third-party keyboards fall into the “risk of having a bad experience” category.