Microsoft Surface Estimated to Have Sold Only 1.7 Million Units Since Launch

Microsoft filed its annual Form 10-K with the Securities and Exchange Commission (SEC) today, revealing that the Microsoft Surface lineup has garnered only $853 million in revenue for the company, which is less than the recent $900 million writedown the company took for the Surface RT. And as GeekWire notes, it's also less than the "$898 million increase in advertising costs associated primarily with Windows 8 and Surface." The numbers account for all Surfaces sold from the device's original fal...