On its face, the promotion might seem minor, but Williams is a 10-year Apple (AAPL) veteran and COO Tim Cook’s top lieutenant. He has also led worldwide operations for the iPhone since it first launched. So news of his new title is fueling speculation that he’s being groomed for the COO spot in the event Cook is someday tapped as CEO. “Someday” is, of course, the operative word here–particularly given Steve Jobs’s high profile lately and the command performance he gave at D8 this year.
