This might not be the best place to ask this question, but it feels like a good place to start.
There are a few FPV goggles with built in head tracking that sends out a PPM signal. Is there a way to use this together with a computer (for example to emulate a mouse)? As far as I know you would need something to interpret the PPM signal and convert it to a USB signal. One solution / workaround is to connect the goggles to a transmitter and then connect the transmitter to the computer. This, however, feels like a clunky solution and it would be nice with something smaller.