This is a page from the Cascading Style Sheets Working Group Blog. Some other places to find information are the “current work” page, the www-style mailing list, the Future of CSS syndicator, and the issue list on Github.
Do you want to know how the CSS WG works? Fantasai has written about:csswg, An Inside View of the CSS Working Group at W3C.
The CSSWG discussed the various problems being handled currently by the vendor prefixing policy and how to solve them better. A rough consensus was adopted around a variant of dbaron’s proposal, which is summarized from the minutes below. A more formal version will be written up for formal adoption in the near future.
If it’s not Web-ready, and must ship, ship it prefixed and don’t expose to Web. (Prefixes here avoid clashes with future Web features.)