ArmA3 HTC Vive compatability, Essentially use DCS World as an example for cross controller VR.
EG, it is launched like a standard VR game, and gives you a normal non-vr menu. You use keyboard and mouse to navigate menus,
and ingame you can use any peripherals that you already have setup [joystick, mouse, keyboard, etc, etc], but it uses the Vive's head set
for head tracking and body position [eg you can walk outside the aircraft, etc]
ArmA3 with the HTC Vive headset would be awesome! Especially with the cross controller setup [keyboard and mouse for movement/weapon aiming, Vive headset for head tracking and body position (crouching, prone, standing)].
I hope the developers see this ! :D Definitely check out DCS World to get an idea of what I am talking about.
Cheers,
Alex