Zephyr (./528) :
Ça deviendrait critiquable si ils tentaient de faire accepter ça comme un nouveau standard CSS, mais jusqu'à preuve du contraire ce n'est pas le cas.

CSS Animation
We’re documenting these enhancements on webkit.org and are proposing the specifications to standards bodies. Note that since they are currently features specific to WebKit they are implemented with a -webkit- prefix, although the specifications do not use the prefix.