Microsoft. Remember them? Of course you do. They’re everywhere. You couldn’t care less about their phones. Windows 8 makes you yawn (for the most part). Surface sounds vaguely cool, but you just can’t see the point. It doesn’t matter: you still use their stuff. Of course you do. Even if you actively avoid them. In fact if you work or go to school almost anywhere, you’re probably using Microsoft all the time.
Microsoft’s rivals covet the deep roots they’ve grown in business, education, and government and wish to uproot them and replace them. No one is trying harder to do that than Google. Google Apps for Business, Education, Nonprofits, and Government grew up on the web, sneaking in the back door so to speak. Its primary appeal was being good enough, and at a better cost (if not free).
For all of their success in this area, Google has never owned the stack. Even the many businesses, schools, and government agencies who chose Google over Microsoft generally still use Windows devices and Microsoft software. Microsoft, on the other hand, can offer nose-to-toes solutions with nothing Googley involved. This puts Google at a potential disadvantage if Microsoft closes the gap, and the back door.