Many investors are beginning to question Tim Cook's ability to lead Apple (AAPL -0.35%), particularly when it comes to driving innovation in the manner in which Steve Jobs was so adept.

While recognizing that Jobs is irreplaceable, Motley Fool analyst Joe Tenebruso believes that Tim Cook has done a lot of things that shareholders have wanted for a long time -- and that Jobs might not have done -- such as initiating a dividend and instituting the largest share buyback in history. But can Cook drive innovation at Apple? Joe thinks we'll have the answer to that question soon. For more, check out the following video.