It has certainly been an interesting week in Silicon Valley as two of the most closely watched companies in the world shuffled their executive suites. On Monday, Apple announced that its chief executive  and charismatic leader Steve Jobs was taking a temporary medical leave – his third since 2004  — a day before Apple released its quarterly results.  On Thursday, Google reported a stellar Q4 and dropped that Larry Page would be stepping into the role of chief executive, as Eric Schmidt takes up the executive chairman position.