Jobs was visionary, not clairvoyant. I'm sure he did everything he could to keep Apple on his track as long as possible, but there's only so much that can be planned years in advance.

I imagine Tim Cook was groomed as a Jobs zombie of sorts. He's an manufacturing/operations guy, not a creative product manager. Eventually Jobs' roadmap will run its course and Tim Cook will be replaced or exposed as an automaton. It seems to be showing already.