I don't know, I work for a multinational manufacturing firm in the lighting industry and we have so many things tied up in Microsoft, it's hard to imagine we could extricate ourselves easily. Whether it's legacy Windows API applications still being used to track inventory or simply users' longtime use of Microsoft Office products, or ongoing development in a .NET environment, I do not think we (or many of our peers) are in any position to start moving away from Windows.

Your point may remain for consumer electronics, but much of Microsoft's revenue stream comes from corporate users anyway.