Microsoft's Surface concept has gone from being a joke to becoming a significant part of its business. Sales of Surfaces devices jumped 38 percent during the last quarter (Q1 2017) reaching $926 million, compared to a year ago when they were just $672 million, according to Microsoft's latest earnings report. The company points to increased sales of the Surface Pro 4 and Surface Book for the drive. CEO Satya Nadella also noted that enterprise orders of 500 or more Surface devices have increased by 70 percent.