Here's a link with a detailed description as to how it currently works for the Oculus Go...
https://developer.oculus.com/documentation/unreal/latest/concepts/unreal-ffr/
and another link explaining how Batman Arkham VR currently utilizes FFR...
https://dcgamessupport.wbgames.com/hc/en-us/articles/360001086228-Batman-Arkham-VR-PC-Graphics-Options
My PC is not rinky dink by any means, testing both Rift CV1 and Odyssey+ using i7-8700k paired with 1080ti... yet i see best performance in game with a mix of Low-Med GFX settings. SS set to 1.0 and HMD set to 1.0... i've spent hours trying to find best settings that still look decent...if we were able to squeeze a little more out of our Graphics cards, by utilizing FFR, VR would be SOOOO much more enjoyable! As much as i'd love to see NVIDIA add this feature into the Geforce experience or control panel...Unfortunately this seems to be currently done on a game by game basis for Oculus Rift, VIVE, and WMR.
https://developer.oculus.com/documentation/unreal/latest/concepts/unreal-ffr/
and another link explaining how Batman Arkham VR currently utilizes FFR...
https://dcgamessupport.wbgames.com/hc/en-us/articles/360001086228-Batman-Arkham-VR-PC-Graphics-Options
My PC is not rinky dink by any means, testing both Rift CV1 and Odyssey+ using i7-8700k paired with 1080ti... yet i see best performance in game with a mix of Low-Med GFX settings. SS set to 1.0 and HMD set to 1.0... i've spent hours trying to find best settings that still look decent...if we were able to squeeze a little more out of our Graphics cards, by utilizing FFR, VR would be SOOOO much more enjoyable! As much as i'd love to see NVIDIA add this feature into the Geforce experience or control panel...Unfortunately this seems to be currently done on a game by game basis for Oculus Rift, VIVE, and WMR.