Microsoft identified the market potential for "mobile devices" fairly early, and development of systems and programs for that market has given them a significant boost; but they've made the grossly inappropriate assumption that everything has to be "mobile."

By trying to make existing programs conform to "mobile device" limitations, they've pretty much destroyed their appeal to the market base that made them rich enough to blunder ahead, and have made their former "flagship" programs, used by large numbers of people for purposes in which "mobility" is of secondary importance, incredibly more difficult to use and impossible for any new users to learn what they can do.

Apple has been crying all the way to the bank doing the same thing. Their recent operating systems (Lion and Mountain Lion) were designed for maximum compatibility with tablet mobile devices, at the cost of making most of their older software not run at all. (Fuck 'em. I'm still using Tiger).

You can hardly blame MS for emulating somebody else's proven strategy.