This is by and large not because of him though. Tim was handed a golden goose with the iPhone and Mac line. Comparing Apple when Tim took over and Apple today and they are not very different. Still majority of revenue from iPhone sales. They have a couple new products now. The only way he could have failed is due to active sabotage.

Apple is "dominant" now in a couple spaces, but if they miss the next thing they will become the next Blackberry.