Touch screen should have maintenance/status display and diagnostics and settings for things you'd take care of while the vehicle isn't moving. Like seat/mirror positioning presets, ride height, towing mode, etc.

I disagree because you probably use the entertainment buttons more than anything. For instance, my wife's car has the volume control on the touchscreen, which is super annoying because it's something I like to manually adjust a lot.

I honestly can't think of what I would prefer be touch screen...really it should just display on a touch screen so I can use it if I want, but everything should be controllable through physical buttons too.