Using vendor prefixes does not equal to being non-standard, from the CSS3 Working Draft[1]:
> there are situations (experiments, implementations of W3C drafts that have not yet reached Candidate Recommendation, intra-nets, debugging, etc.) where it is convenient to add some nonstandard identifiers to a CSS style sheet.
Most extension Apple used in the demo page are part of CSS3 Working Draft, including CSS transform[2].
> there are situations (experiments, implementations of W3C drafts that have not yet reached Candidate Recommendation, intra-nets, debugging, etc.) where it is convenient to add some nonstandard identifiers to a CSS style sheet.
Most extension Apple used in the demo page are part of CSS3 Working Draft, including CSS transform[2].
[1]: http://www.w3.org/TR/css3-syntax/#vendor-specific
[2]: http://www.w3.org/TR/css3-3d-transforms/