>It's not about touch nor physicality of a button or knob, but about a control that is not dependent on UI state No, I disagree. The heterogeneity and tactile

>It's not about touch nor physicality of a button or knob, but about a control that is not dependent on UI state No, I disagree. The heterogeneity and tactile response of the UI is fundamental, at least for me. Which quadrant of the display is the control in? You flick your eyes to check. Ok, now is my finger in the right place? You need to check again. Is it at the right level… For the terminally space-brained like me, buttons and dials work much better. You flick your eyes and can see where the control is and in relation to what. Now you can trace with your finger to the area of the controller, and feel around to locate it in relation to the other controls. If it is ridged, you have tactile feedback on its orientation.