Most if not all MR devices drive the camera automatically. How is this supposed to be achieved using Windows Standalone for example, where I use the mouse as input device. I suppose there is some sort of WASD movement, either already available, or implementable?
You can use the Input Simulation Service to move the camera in Windows Standalone. Then the camera will move using WASD. To enable this for Windows Standalone, just enable the Input Simulation Service for the Windows Standalone Platform: