The fact we still can't get this in the US is atrocious. They have already paid the cost to implement this for the EU and Japan, but simply don't allow it for US users because... spite, I guess? Horrible. It reminds me of when I asked for my account to be deleted from some online learning site (Udacity maybe?) And they're response was: "Nope, we only do that for European users." Like they went through all the effort…
If by "this", you mean "a set of rules so complicated that no 3rd party will ever ship a browser"...
In practice, they've shipped a whole lot of nothing, and we still don't have any 3rd party browser engines available in the EU