Earlier quoted context omitted.
Agreed. But I don't think the situation is as dire as the article paints it. Office is not going anywhere anytime soon. The rise of smartphones does not suddenly mean that there is any lesser demand for Office. The enterprise trusts Microsoft (with good reason IMHO) and if they stay on their game they can continue to dominate the market. Can you imagine trusting your billion dollar company to Google's half-assed supp…
I get the feeling he looks at how Apple is thriving on a closed ecosystem ("OS X Everywhere") and wants to succeed in a similar way, but he is utterly incapable of it. Ah, but that's the thing-- Apple didn't go for "OS X Everywhere", they were willing to segment their OS strategy, and developed iOS for the iPhone and iPad. There's no telling what the tech world would look like now if Microsoft hadn't tied their table…
The point is that Apple integration is very tight across devices, in a way that must be very appealing to Microsoft from a business perspective.
But Microsoft has it's own strengths, such as catering to the support and feature needs of the enterprise. In a way it mirrors Apple's strategy of targeting the high-end consumer market, Microsoft targets the highest-end software market, period.