Darken / dim / blackout non-primary display

[ohadschn]

What workfow do you want to improve?

Not strictly related to sound, but as a tool made for gamers in general and Steam Big Picture mode specifically, I think it makes sense.
I use Big Picture mode to launch my games on my secondary display (which is the TV) by making it the primary one, but then the monitor remains on and degrades the immersive experience.

How to make it better?

It would be great if in addition to switching over the sound, SoundSwitch could dim / darken / black out all non-primary displays

Any alternative?

1. Manually open some blank JPG
2. Physically shut down the monitor (but that can result in inadvertent switching of the main display even after the game has quit).

Additional context

I wrote a tool for this but at some point it broke and I'm not maintaining it anymore, in part because big picture mode + SoundSwitch is a great alternative: https://sourceforge.net/projects/tvgamelauncher/