You can look at chrome's behaviour for the last couple of years to get an idea of how this might play out. Basically, the big browser vendors are the new stand

You can look at chrome's behaviour for the last couple of years to get an idea of how this might play out. Basically, the big browser vendors are the new standards bodies, and the w3c/whatwg plays catch up with what the browsers are implementing. If three browsers all agree to implement something, it gets implemented without waiting to hear what a standards organization says, and then it gets documented in a standard later on.