Source: http://www.forbes.com/sites/timworstall/...

There’s a more important point behind this though: Chrome OS has blown right through the sort of market penetration that Apple's Mac OS was getting in the 90s and Microsoft thought of that as a threat and quite rightly too. For the whole success of Microsoft’s Windows is based upon network effects. Everyone buys Windows because everyone buys Windows. Because that is true then everyone develops for Windows and so the loop closes.