I aspire to be intelligent with moments of genius.
So far, I have managed awkward with moments of competence.
A knob that will "re-analog" the knobs via a touchscreen interface - a really high tech way to go backwards. How about desingning a better touch interface or, even better still, using existing tech. Here is the Griffin Powermate - a USB multi-purpose knob. Couple with a touchscreen and you get the same result. Select the digital knob by touching it with your left hand, adjust using the knob in your right.