If that is the deciding factor, you can put the buttons and knobs on a face plat...

		stubish 9 months ago \| parent \| context \| favorite \| on: Touchscreens are out, and tactile controls are bac... If that is the deciding factor, you can put the buttons and knobs on a face plate mounted on top of a touch screen, with the unpowered buttons just acting as fingers. But I don't think manufacturing cost is the real issue.