Rear-view cameras are neat, but the one time I tried one I found rapidly switching focus between a car 50 feet ahead and a screen 1 foot away to be rather tiring for my eyes.
Maybe I'm just not the target market for this sort of thing.
It's super fun when parked to have the big screen and play games with the kids, it adds a ton of bonding time that would otherwise be not quite as fun.
I wouldn't mind a physical wheel similar to the newer Ford Explorer's where a rotatable wheel is affixed over the touch screen so that it feels like it's part of the touch screen.
It's VERY bright at nighttime, which I think could probably be fixed with an OLED panel and working ambient light sensor. Additionally the volume controls are capacitive buttons to the left of the display. I've seriously considered modding in a manual volume knob because of how annoying it is to adjust while trying to pay attention to the road.
I can't even imagine having to adjust things like windows, windshield wipers, or climate control all with a touch screen.
I find it incredibly helpful and not distracting at all.