Unfortunately, I don't think yesterday's events are going to change people's attitudes.
I always listen to the safety demo/video, regardless of whether I know it off by heart for that type or not. 2-3 minutes out from reading the inflight magazine on any length of flight won't hurt.
As for everyone else - as much as I'd like to think they'd start to pay attention, the simple answer is they won't. Why? Because the mentality will always be "air travel is the safest way to get around, accidents do happen but it'll never happen to me..."