I also thought at some point if I could maybe create a thermal headset based on a modified Google Cardboard. So basically you would just connect a Flir One Pro and then grab the thermal image and display it in a simulated stereoscopic mode. Problem: how would you realign the thermal image and the visual one without having access to the touch screen? So I kinda scrapped the idea. One of the problems is the refresh rate and there I advise you to take that into consideration because in VR, anything under 90FPS can induce nausea.