Microsoft is about to get a new CEO, only the third in its 38-year history. Whoever takes the job knows that the scrutiny will be intense. The expectation is that after a brief honeymoon period the new chief will unveil a plan that could alter the course of Microsoft's history and reveal the fate of Windows, Bing, Xbox, and other parts of the company's product portfolio. Will Bing and Xbox businesses be carved out or sold? How will Windows recover from the decline in PC sales and Microsoft's slow start tapping into the mobile revolution?