It works pretty well. Here it is in Talos (a really nice puzzle game) and you can see it puts a panel ‘under’ your controller, so you just rotate to see it.
Here’s DCS (Stand alone, not the Steam version, but it uses Steam/OpenVR so I can use this):
Because I don’t use hand controllers in DCS, you can just mount it as a panel below main eye sight. As you can see, keeping to over 45 fps is hard, but in-game it looks smooth due to reprojection.
To make things easier to see rather than Magoo-vision, here’s a static screenshot.
Here you can see that my system maximum for DCS is about PD of 1.5, with SteamVR Super Sampling set to 96% (I run the SteamVR setting ‘Video’ at 160%, so put the DCS.exe as ‘Application’ 60% as it doesn’t impact how DCS looks, just the in-sim PD value does). This is on a 1070 with an i5 @ 4.5 GHz.
I’m hitting 45 fps pretty steady and projection making that look like a smooth 90 to me, without my GPU % hitting 99% all the time, my GPU memory also not maxed out (would be bad), and my CPU comfy at 56%. RAM is ok, but this is just a free-flight mission.