Palette gear, Loupedeck and similar hardware physical imputs
Whether it is for substance Designer, Painter or Alchemist there are so many dials to tweaks within the software to justify the use of these physical buttons enabling us to work both faster along with more precision.
I would see the use of it absolutely everywhere. Either withing some node settings or even attaching them to some exposed parameters that would be a perfect fit.
It has already been compatible to a lot of Adobe products and that would make our work much more comfortable than the current limited peripherals that we have today.