One might simply say it's a problem of inertia. The company has found itself shifting more and more to serving a business audience, notes Bartels.
"I think that if you look at Microsoft's revenues, $18 billion or so in the quarter, and you look at where that's coming from, you realize that over half of it is coming from, effectively, sales to business."
That means room to improve in the consumer market. The company is working on revamping many of its products: Windows, Office, Windows Server, and Windows Phone, as CEO Steve Ballmer said on Thursday. If those can get out of office buildings and into the hands and pockets of consumers, it would go a long way toward ensuring future sustainability.
Danielle Kurtzleben is a business and economics reporter for U.S. News & World Report. Connect with her on Twitter at @titonka or via E-mail at firstname.lastname@example.org.