Apple COO Tim Cook in line for GM CEO?

Silicon Alley Insider reports that Apple COO Tim Cook may be in line for the top spot at GM.  Key quote: “He’s also clearly in line for the (Apple) CEO slot when Steve Jobs decides to relinquish it.”  Relinquish?  Clearly ridiculous.  El Jobso is Dictator for Life. Hasn’t Nicholas Carlson read Options?