[css3-ui] Would be cool with support to use standard icons from the platform

All operating systems / desktop environments come with a set of standard icons.
Such as New, Open, Save, Save All, Print, Cut, Copy, Paste, Undo,
Redo, Search, Help, etc.

It would be cool if these icons were reachable from CSS.
Then web apps could use system icons, and it would be cross-platform
and have native look.

Example:
#save {appearance: button; icon: save}