Science Guy Bill Nye, who has a TV show geared towards getting kids excited about science, said that Microsoft is in trouble with U.S. regulators because politicians are irritated that Microsoft's Internet Explorer browser doesn't always function as advertised.
On the one hand, he noted that Microsoft has a long history of providing cross-platform applications. (You can run Office on the Mac, for instance.) And he also noted that you can run the limited function Web-based version of Office in a browser on basically any device at all, including iPads and iPhones, to read documents and do some light editing.