Microsoft's Terry Myerson confirmed onstage at Build what many of us suspected in the hours leading up to the event -- the company's going to make it easier for developers to bring Android apps into the Windows Store. To make this possible, Myers said, Windows phones "will include an Android subsystem" meant to play nice with the Java and C++ code developers have already crafted to run on a rival's operating system. Turns out, that's not the only dev-friendly coup we're seeing today: iOS developers can compile their Objective C code right from Microsoft's Visual Studio, and turn it into a full-fledged Windows 10 app. This, frankly, is huge. With one announcement, drawn out of the course of a few minutes, Microsoft may have just changed its mobile trajectory completely.