The idea is to show some useful one-liner tips about non-obvious features on the splash screen. This way users might learn things like alt-wheel on enums, ctrl-c for RGB curves and so on. It is pretty simple to fit into the splash screen, just would probably need some more attention to font style:
(please excuse the crudity of the model -- didn't have time to build it to scale or paint it)
It could be done as a simple text file from which random line is read on startup and displayed on the splash.