Image source: Microsoft.When Microsoft (NASDAQ: MSFT) first unveiled Windows 10 last year, Terry Myerson -- head of Microsoft's OS group -- said the new OS would be used by 1 billion devices in two to three years. That figure encompasses all the devices Windows 10 can run on: PCs, tablets, Xboxes, and smartphones.For reference, both Apple (NASDAQ: AAPL) and Google each have more than 1 billion devices that use their varying operating systems (iOS, macOS, watchOS and Android).Continue reading