By Chris Isidore and David Goldman @CNNMoney May 2, 2014: 10:51 AM ET
Toughest act to follow: Tim Cook
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When you take over for Steve Jobs, widely recognized as one of the greatest CEOs in corporate history, you've got some big shoes to fill. Apple(AAPL) has performed well under Tim Cook, but investors are growing impatient for the company to produce a successor to the iPhone and iPad.
