John Carmack, chief architect of all id Software game engines up to now, has joined a pioneering virtual reality headset developer Oculus VR as its Chief Technical Officer. Here is what John himself says about this:
I have fond memories of the development work that led to a lot of great things in modern gaming – the intensity of the first person experience, LAN and internet play, game mods, and so on. Duct taping a strap and hot gluing sensors onto Palmer’s early prototype Rift and writing the code to drive it ranks right up there. Now is a special time. I believe that VR will have a huge impact in the coming years, but everyone working today is a pioneer. The paradigms that everyone will take for granted in the future are being figured out today; probably by people reading this message. It’s certainly not there yet. There is a lot more work to do, and there are problems we don’t even know about that will need to be solved, but I am eager to work on them. It’s going to be awesome!
My time division is now Oculus over Id over Armadillo. Busy busy busy!

According to id Software, however, he "is not leaving id & will continue to provide leadership for their games in development".

Source: Occulus VR Press Release