Despite what it claims to be its best efforts, Microsoft (MSFT 1.44%) remains sadly unable to escape the black hole that is the global PC market. And since this isn't the most enjoyable place to operate, Microsoft's trying just about anything it can to break away. The company has introduced its own tablets, which, as far as we can tell, have largely flopped. Perhaps more alarmingly, its presence in the smartphone space is also still negligible. So clearly, setting the stage for success in the mobile world is easier said than done, which, says Fool contributor Andrew Tonner, raises significant concerns about Microsoft's long-term prospects, a trend investors could see beginning to play out in front of their eyes in a few ways today.
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