Motion cancellation can counteract the motion system's impact on the VR-headset. Essentially subtracting the rig's motion from your own.
Update 7th May 2023
SIMRIG Control Center includes native support for OpenXR. Motion cancellation is available as an OpenXR API Layer. This allows non-SteamVR headsets to take advantage of motion cancellation while enjoying the performance benefits of OpenXR.
SIMRIG Control Center includes native support for VR motion cancellation on SteamVR.