Why Steve Jobs can rest easy

If you've read Walter Isaacson's biography of Apple co-founder Steve Jobs, you know he had a profound respect for current CEO Tim Cook. You also know that he never considered Cook a "product person."

Whereas Jobs and Apple design chief Jony Ive were what Isaacson described as soulmates in the quest to create perfect products, Cook was a calming force who oversaw vast improvements in day-to-day operations. The yin to Jobs' yang, you might say.