Well. The specification is finished !
Where is it ? You can read the most recent version here. It is this version that will be submitted to the W3C Director (Tim Berners Lee), in order to make it a real W3C recommendation. Crossing fingers.
Is it real ? Yes. During the lifetime of the spec we got major browser makers contributing and monitoring, aka, Google, Microsoft, Mozilla. Thus it is implemented. See http://caniuse.com/#feat=cryptography
Where is the interoperability proof ? The test coverage can be found here.
So. What is the future ? Consider things are moving on, and the group will soon enter its maintenance mode. the next action, once the specification is a Recommendation will be to listen to the market and add any new algorithm that will be widely used.
Thanks ! That was a long and passionated work in W3C. Thanks to all members and individuals who contributed…