How about just real knobs, sliders and switches?
What is great about them is that they can be different shapes, sizes, and textures.
You can learn which is which by feel.
With any flat screen, even with tactile controls it is still one dimensional. You can actually hold it.
Even Ford is going back to offering some knobs and buttons because drivers (you know, the people behind the wheel) found that touch screen everything just doesn't work so well.