That would be atrocious (but not really much worse than the all-in-one infotainment screens we already have...) But my gut says automakers haven't gone there because it would make support and liability that much more complicated - "the operator was distracted at the time of the collision... but they weren't trying to turn on the defroster, they were watching Youtube!" On the plus side instead of being stuck with a never-upgraded head unit, with an orphaned 3G modem, you'd at least have connectivity that kept working.