What if Windows 10 fails?

It has been 25 years since the potential market failure of a Microsoft operating system carried serious consequences outside the corporation's own campus. MS-DOS and Windows versions have failed to gain traction before and even been publicly lampooned. But in that quarter-century, Microsoft's dominance of the desktop has kept the platform afloat, even when consumers and businesses stalwartly refused to upgrade.

Today, the word "dominance" doesn't really apply to Windows, and especially not to Microsoft.