Check out Michael Abrash’s slides from a Steam Developer Day (from back in Jan 2014, but I only just discovered it now):
EDIT 21st March 2014. Found the accompanying YouTube video. Enjoy 🙂
Also, just uploaded some footage from the SXSW Game of Thrones experience. Grab a copy here Hipster Squid if you want to check it out (http://www.hipstersquid.com/). I found various issues with this demo, but the concept is interesting and (in particular) interesting that such a large franchise are looking at VR.