By all accounts, Microsoft is at a crossroads. From its birth in 1975, it has swelled from a one-product tech company to a multiplatform software and services entity that earned more than $60 billion in revenues last year, more than Apple and Google combined. And while it enjoys vast reach and market share, it now battles rivals at nearly every turn, particularly in search, mobile, and entertainment. In its most recent earnings report, Microsoft posted its first ever year-over-year quarterly ...