For folks who are using touch displays, it would be really nice to have the concept of a control that’s in focus, and to be able to map either a device knob or a midi CC to changing whatever’s in focus. This would be especially useful if you’re using a tablet, where tapping a control to focus on it is relatively easy, but precision value adjustment is more of a pain.
I’m picturing this as a separate UI mode, which I guess could eventually grow to have other tablet-friendly adaptations.