Apple will be quick to try to lock out the competition with patents and you can be sure they'll spend a fortune to keep Android out of the car infotainment segment.
The other problem is that not everyone has or wants a smart phone so should they be told, sorry pal, your SOL.
What would be nice is an infotainment system that has a decent built in system with NAV and BT phone and music with USB, BT and built in (SiriusXM etc); and, in addition, a feature to allow a smart phone to drive the whole thing without being locked to iOS or Android.
The other other problem is that car makers like to control things so giving things over to Android or iOS is not something they're inclined to be happy with.
2012 FF Ti HB Sonic Blue, Built 5/7/12, 401A + Parking Technology Package and MFT w/NAV 3.0.2 -> 3.2.2 -> 3.5.1 -> 3.6.2