After reading http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1392095
and seeing that Innovega likes to use OLED and seeing some of the Oculus like tricks they want
to do to achieve the 120 FOV, I am wondering if Innovega is needing a custom display to achieve these tricks. You can read the article by "renting" it for 5 minutes a day (I used the windows 8 snipping tool to screen capture the 10 pages in my 5 minutes) at http://www.deepdyve.com/lp/spie/novel-hmd-concepts-from-the-darpa-scenicc-program-42pzXiYCkk