I didn't say they _have_ to use a walled garden; I'm claiming that they know how lucrative that approach is and how submissive their consumer base is, and so are likely to choose that path to pad their revenue.

It's not even a particularly bold prediction; it is completely in-line with their whole product tragectory.

You will accept OSX turning into iOS, and call it innovative, powerful and unburdened; because that's what Apple will call it.