I'm a fairly proficient linux user and I just can not get streaming to work properly and I've dedicated multiple hours to trying to set it up. The built in Steam streaming gets the closest but often just lags out for no obvious reason. Sunshine/moonlight seem to be close to working but weird display issues are constant. I've got it to the point where the steam big picture video streams perfect but when you launch a game the screen size seems to change where I can only see part of the screen on my target device.

Feels like a technology that is theoretically entirely possible but the current implementations need a lot of polish.