It's totally possible to make touch screen displays that can be operated in bumpy environments without looking at them -- Aviation has been using them for some time. Instead of clicking on buttons, interactions only require touching entire regions (eg. top and bottom half) of the screen when input is requested. (See apps like XCSoar, LK8000, etc.)
The problem is that they are either hard to learn to use, or really ugly. It's always really bugged me that Google Maps on a phone (or in Android Auto) has tiny buttons that are impossible to click for the most basic tasks.
What's I found even more frustrating about google maps is that one time it promted me to perform a survey about the app itself. During a trip, whilst driving. It was not a local guide thing or a play store thing. It redirected to a page inside the maps app which was just impossible to use whilst driving (and not much better when not driving also). Needless to say I didn't finish the survey. I wanted to complain about the fact I even got the survey in-app. But later there was also no way to get back to it.
The problem is that they are either hard to learn to use, or really ugly. It's always really bugged me that Google Maps on a phone (or in Android Auto) has tiny buttons that are impossible to click for the most basic tasks.
It doesn't have to be this way.