He was the leader that everyone emulated and when his competitors thought the well-spring of genius ideas had dried up, he did what any misfit would do : he changed the world.
Steve Jobs is an Icon.
The same cannot be said for what's his face...I mean no disrespect for Apple's current commander-in-chief, but to put it simply, he lacks the "lack of polish" and willingness to go beyond the convention that his predecessor embodied. Moxy alone could be enough to drive a company forward : I think there's much to be said about Yahoo!'s reemergence due to Marissa Mayer's leadership, despite some significant missteps or questionable calls along the way.
Ultimately, investors have to feel that there's something special with the next product line up ; the consumer electronics industry can be extraordinarily fickle, and if you're behind a month, you've really lost several years of potential revenue. The capital gains incentive seems mediocre, while the dividend yield is definitely so : more passive gains could be had by holding Treasuries and at least we know that the U.S. government can never fail...at least not without a fight.