Your tablet/phone, with tiny ass buttons designed to be used when you're focused exclusively on the tablet is an absolutely shitty device to use in a car. They are in fact a danger to you and everyone else on the road.
Car 'infotainment' (god I hate that word) devices are designed to be dealt with at a glance, without focusing on the device exclusively. No matter how clunky you think Honda's interface is ... its 10 billion times better than your tablet interface after you plow into a tree because you couldn't hit the button without looking directly at the screen and precisesly hitting the right spot.
iPad/Android app developers in general have NO CLUE how to deal with the ergonomics of cars.
WHY do you NEED in car apps. You are supposed to be getting from one place to another. A GPS, some audio and a few other minor things are the only apps you actually should have access to in your car. You should not be able to run any random app just because you're too stupid to realize how dangerous what you are doing is.
I could ramble on for hours about why tablets as carputers are a bad idea.
Just because you think the car makers don't know what they are doing, doesn't make it true. Its your own ignorance thats the problem.