I think the thing to remember is that there's a big difference between your first impression of a vehicle screen and how you are after an hour, a day, a week, a month of living with it.The touch screens in cars are beginning to resemble Netflix' home screen! Totally confusing and no help in finding what you want.
I'm in two different cars every week and the fact is, I rarely look at the screen, no matter how large it is, unless I'm checking the map. And then, it's a lot quicker and easier to get a brief but informative sideways glance on a 12-inch screen than it is on the low-res four-inch in my wife's ten-year-old Nissan.
Most of the climate stuff (at least for me) tends to be set it and forget it, and there's nothing to look at in terms of the radio display, really. You know it's Hotel California and you know what the album art looks like.
