One problem I see as badly in need of a fix (which I don't see coming anytime soon) is fragility of the electrical grid. Even if you have your own generator, a prolonged breakdown would disrupt many systems, and produce a lot of desperate people.

"There are only nine meals between mankind and anarchy. It may be taken as axiomatic that a starving man is never a good citizen." - Alfred Henry Lewis

Nine? Lewis was an optimist.