And when you RTFA, you'll see how the author basically argues against his own 'do or die' thesis at the end of it.
here's the relevant bit, from TFA: ...there's lots of room for Microsoft. Consumers love their mobile phones, but they switch or upgrade as often as every one or two years. Also, consumers typically sign up with service providers like Verizon and AT&T and will happily switch to the next best phone. Who's to say an AT&T customer's next phone won't be a Windows Phone?
So until customers stop getting new phones every 2 years, or start caring much more about their phones OS, I don't understand why this is " officially Microsoft's last, best chance for relevance in the post-desktop computing world."