I bring this up since our industry moves so fast, and I'm curious what others saw come and go either with a lot of fanfare and or nearly none at all, or something that didn't get a lot of attention fade away.
The one that really hits me now is Parallax Scrolling. I remember everybody scrambling to use this in their sites less than a year ago and now almost nobody uses it anymore.
What's your observation?
Hover states are also mostly gone from good design.
Fixed-height layouts were a fad that I think is on the decline, for good reason.