Earlier quoted context omitted.
> As a User Experience Professional, I was never able to grasp the true user's need for touch screens in cars. You are viewing the 'need' from the end user perspective. That is likely not the driving force that is causing touch screen proliferation. The likely driving force that is causing it is the manufacturers BOM costs. A single, rectangular, touch screen, that can swallow up a bunch of different knobs and button…
Are knobs and plastic moldings that expensive though? I'm not sure this is really a driving factor. Touch screens have marketing appeal (at least from the seller's perspective), I have to think having a shiny touch screen on your new Mazda is simply just trying to get more people to purchase a new car and nothing more.
Maybe throw in some cheeky DLC to unlock certain features too ;)