We learned last week that Microsoft is getting serious about virtual reality, shipping an Xbox One controller with the finished Oculus Rift headset and allowing Rift owners to stream (non-VR) Xbox One games to a virtual screen in the Rift. Microsoft reiterated that promise at E3, but it also went a step further. It announced a partnership with Valve VR, saying it "will be working closely with Valve to make Windows 10 the best platform for VR gaming."

What does that mean? We don't know, exactly. One of the big problems with headsets like the Oculus Rift or HTC Vive (co-developed by Valve) is that VR games are very resource-intensive; it's going to take a powerful PC to run either one. But Microsoft can help make them more user-friendly for Windows gamers who can run them. Oculus has promised that plugging the Rift into a PC will be a painless experience, and even if Valve is working on its own operating system, we can only imagine it wants the same thing on Windows 10.