Keep in mind that cosmic is still in an alpha build. It’s missing a lot of features and his buggy here are there. I’m sure it will be pretty awesome and once it releases it 1.0 version.

Is this one of those things where people try to install Linux on something simply to see if it can be done, or is there a practical upshot to this?

Both gnome and KDE have this functionality built-in to the system now. It’s under display settings.