When Steve Jobs returned to Apple from NeXT he famously found their product lines confounding. When Tim Cook inherited Apple, an argument could be made that Steve Jobs' greatest product, Apple itself, was confounding. Steve Jobs' solution, famously, was to draw a simple grid and in each of its four quadrants, laptop and pro laptop, desktop and pro desktop, placed a core product. Tim Cook just did the same thing, drawing up a simple grid, and in each of its four quadrants, design and technology, software and services, placed a core person -- Jony Ive and Bob Mansfield, Craig Federighi and Eddy Cue.