[Phalanx]

Just thought of one...the fondue craze...that pretty much blew right up HUGELY, then just blew on out.
I know there's atill places that do it though...god knows, it's easy enough and (now) cheap enough to simply buy your own setup.

While still on food...
The widespread acceptance of "sushi", of all styles. I have always loved it myself, but I remember a time where the stores were few and far between here, where every second person would say "ew, raw fish" if you so much as mentioned it. I guess word of mouth eventually worked for this one.

The cell/mobile phone revolution, now they're almost considered "neccessity" by (I'd say) 90%+ of people. Still don't like 'em much myself.

One that's underway at the moment, that I personally consider pretty "big", is the gradual phasing out/banning of public smoking. It's a smart move...IMO a lot of smokers simply aren't respectful enough about it, I accept that they're spoiling their health, cool...but they don't tend to look outside and see the damage it does others, or don't acknowledge it anyhow. But yeah, I think this is one of those "big changes" I'll live to see.