TheShape31 on 24 January 2014
Valve actually just announced that they will not be unveiling their own VR hardware, and are instead putting their full support behind Oculus Rift. So apparently The Witness will be compatible with that instead.
http://www.ign.com/articles/2014/01/17/valve-has-no-vr-headset-supporting-oculus-rift-instead
