Found something interesting.
GeForce Experience settings for Elite Dangerous: Horizons VR are reporting that in HMD mode Elite Dangerous is running at 1280x720 resolution (both current and optimal):
http://i.imgur.com/m58Ivri.png
There is no way to change the HMD resolution through GeForce Experience (the option is grayed out).
This seems incorrect because Vive resolution is 2160x1200 or 1080x1200 per eye. So the recommended resolution setting should be 2160x1200 or 1080x1200, not 1280x720.
Also if you drag the slider all the way to Quality in GeForce Experience for Elite VR, it changes the HMD image quality from 0.890 to 1.000 and the game looks better in HMD but still not quite right.
GeForce Experience settings for Elite Dangerous: Horizons VR are reporting that in HMD mode Elite Dangerous is running at 1280x720 resolution (both current and optimal):
http://i.imgur.com/m58Ivri.png
There is no way to change the HMD resolution through GeForce Experience (the option is grayed out).
This seems incorrect because Vive resolution is 2160x1200 or 1080x1200 per eye. So the recommended resolution setting should be 2160x1200 or 1080x1200, not 1280x720.
Also if you drag the slider all the way to Quality in GeForce Experience for Elite VR, it changes the HMD image quality from 0.890 to 1.000 and the game looks better in HMD but still not quite right.