Using CSS3 fadeIn commands

Question

This site uses fadeInRight and fadeInLeft CSS to enliven its web design process: http://projectassistant.org/business-in-a-box/website-design-development/bizbox-process/
It would be interesting to know how other web designers are using these or similar CSS3 commands. It may soon get old, but it's otherwise a nifty and efficient way to enliven content.

Answer 1

To be clear, fadeInRight and fadeInLeft are just what that site's developers decided to name their animations and classes, there's no css attribute/value of fadeinleft or fadeinright, they used animations and keyframes to do that.
The CSS3 animation and keyframe attributes are becoming a lot more common and can do all kinds of very cool stuff with just a few lines of code. There's no reason not to use them if the bulk of your visitors use modern browsers. They typically function across all devices pretty consistently as long as you add in the prefixed duplicates.
Certain things will get old, just like certain javascript effects have, but if done correctly and creatively, you can keep your stuff from going stale pretty easily while working in CSS3 animations.