We've already seen how the Xbox app (and Xbox One streaming) is coming to Windows 10, and now we get to reverse that. Microsoft's gaming chief Phil Spencer just announced that Windows 10 is coming to Xbox One. "For developers that want to bring their application over the TV screen this is going to make it very easy for them to do so."
Aside from jokes about using Excel on a game console — which is to say, no Microsoft isn't planning that — not much else was discussed here (we're cautiously optimistic that we'll learn more at the annual Game Developers Conference in March). At today's event, Microsoft also announced a new Xbox app for Windows 10 and, more importantly, Xbox One streaming to Windows 10 devices.