That last part - letting your phone cast - basically is Windows 10 Continuum. The head unit still needs a way of receiving that signal and doing processing like using the touch screen in the dash, so it isn't just a HDMI jack. It's more like Remote Desktop with some tweaks. That said, do I want a Windows 10 phone - no not really. Do I want something like it for Android to my UConnect's 9" screen, yes. Even in the summary this said when the car is parked or auto drive. As an owner of a car with adaptive cruise + lane aware, it's actually a pretty reasonable proposition. My interaction on the daily commute in heavy traffic is lane changes and turns or taking over in cases of bad weather. I don't abuse it and keep my hands on the wheel (it yells at me if I don't) but I have very little I have to do while in the traffic crawl on the highway and my car isn't one of the fancy ones like the Tesla that can do much more. Right now it's just chilling to audiobooks, but we aren't that far from large periods of being completely interaction free.