In what could go down as one of the most important Microsoft events of recent years, the tech giant invited people to its Redmond, Washington, headquarters to break down the next version of Windows. As part of this, Microsoft just revealed that Windows 10 will bring the Xbox app to every PC and tablet running on the new OS. Head of Xbox Phil Spencer took the stage to announce how system-level Xbox One features, like messages and the friends list, will integrate with Windows 10. "Gaming has become a much more social activity," said Spencer during the presentation. "Gaming is personal."