I personally like the touchscreens since it's a nice change to page through different menus for different sources or make bluetooth functions like calling a little more sensible. Even putting A/C functions into it can work if they pull it off correctly as in being responsive when you do something, being well placed, or have physical knobs that interact with the screen like my dad's truck.
But at the same time I don't like what they occasionally do which is what some people call feature creep which is putting features that don't really make much sense in a larger system or some cases hamfist it. As much as I like my new Subaru and all it's glory, I find it a little unnecessary to connect my Google Calender to my car if it takes me an unreasonable amount of time to even check the calendar (page through menus, wait for phone to communicate.)
I also agree that there's a lot of fluff like Wi-Fi enabled cars (Who wants to pay for internet service in a car if you have a phone with internet service?) and radios with social media support (I don't need Facebook in my car. Or at all.) but at the same time I can see where it would make sense for someone.
I think I just want the head units to at least have customization so you can tuck away the stuff you don't want and have what you need or have more cars with CarPlay and Android Auto since those will support your phone's ecosystem and make the whole put-your-everything-into-this-radio make some sense.