CarPlay for iPad
Mercedes' new interior department basically just put a cheap tablet on the dash for CarPlay, but this gets me thinking: Apple should release a version of CarPlay for iPad. It would be a mode for apps to be large, easy to push, Siri integrated, and possibly allow for a Onboard Diagnostic engine codes bluetooth attachment. If they wanted to take it a step further, media should be shared between your phone and iPad.
If you didn't mind using the regular version of iPad apps, this is already a possibility.
I wouldn't mind having an iPad Mini as my in-dash display.