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!
-Twitter

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