Ideas that have come to mind using of basic lights and OpenRGB...

Use Extension Cables to run ARGB to the back of the screeen, attach strips to the back for back-lighting driven by screen edges.

Use ARGB Grids to put quick indicators of heat-sensors in a visible spot like the front of the case.

RGB light to light the Desk Area for paperwork / art at night and/or webcam vision.

RGB strip to create a guide for slam-based VR Headset. (Already have something like this on my external USB 2.0 Hub)

Control some other piece of basic hardware, like access control, using RGB/ARGB to send codes instead of colors.