"I see three possible outcomes, in decreasing order of likelihood: status quo, where they just "fix" the bugs as they hit the news; some sort of massive push towards real computer security, in this and other industries; or a massive reduction in features to avoid the flaws."

Only one of those three is the correct answer, and it is the third one.

Your car does not need a wireless network - since you have a newer, nicer one in your pocket every 18 months.

Neither does your refrigerator nor your smoke detector.

These are self-inflicted problems and they're easy to solve - just remove the gratuitous complexity.