This only matters as long as Apple continues to make products consumers want most. If (as many speculate) this changes once the product pipeline that Jobs oversaw before his death is exhausted, the Cook supply chain dominance won't really matter; less people will buy Apple products and Apple's power to make these sort of plays diminishes. If Apple continues to make products consumers want most, then who cares about supply chain coups? Everyone else has a bigger problem on their hands.