Comment 27 for bug 1682542

"we'd need to figure out the overview (only include the activities button on the primary monitor? or allow an overview on any monitor?)"

That's a good point and really should already be supported, I noticed you currently can't see what are on the other monitors in overview mode either. Some of this could hidden behind gnome-tweak-tool if it is deemed too complicated for regular users, as is done for some of the options already.

"get API to control the brightness of a particular monitor (rather than the built-in one)"

I'm not sure how monitors other than the ones I have access to work but usually only eDP monitors can control brightness via software, right? I know it doesn't appear to be adjustable via software on my current HDMI LCDs. If newer additional screens (eg hdmi/dp) can be adjusted through software that is probably something that should be supported as well. However, I have seen ads for some newer monitors that appear to possibly be only adjustable via software, I don't know if they do that over the HDMI/DP connection or via some other manner, eg USB.