I've been chatting with Cox bouncing my modem, checking settings, for about two hours now. Three different Netflix guys all unable to solve the problem until the last guy, Rod, asks this question: "Which Season of House of Cards are you watching?" about 19 minutes into our little chat.
Dear Netflix: When a customer has a chat with you about not getting House of Cards in 2160p, here is the first question you ask: "Are you watching Season One?"
And if they say "Yes", you say "We're really sorry for our mind-numbingly stupid user interface graphics which say Ultra HD 4K everywhere, even when starting an episode of Season One, because it turns out that Season One is only 1080p and if you wouldn't mind trying an episode of Season Two then we can see if 4K works there"
And lo and behold Season Two plays 2160p like a charm.
Fortunately, I have a very nice 18 yo single malt waiting to be opened and perhaps in a few hours we can have a good laugh about it all.
So far it is turning out to be a very nice drink.