Well, I did my own research and thus does more or less what I would want, but only works on Rift and Vive: http://store.steampowered.com/app/382110/Virtual_Desktop/

This rather complicated process does work with Gear VR (and so should work with Oculus Go), but seems to only support one monitor (and streams only games?): https://www.vrheads.com/how-stream-your-pc-desktop-your-gear...