They are proposed standards. See my comment at http://news.ycombinator.com/item?id=3456815 http://news.ycombinator.com/item?id=3456815. Standards don't appear

They are proposed standards. See my comment at http://news.ycombinator.com/item?id=3456815 http://news.ycombinator.com/item?id=3456815. Standards don't appear out of the ether, fully formed and ready to be implemented. Properly developed standards are built precisely the way Google is building them: with a publicly available proposal and a reference implementation in widely used software.