Well most of you may know this already, but it is news to me. Netflix app (or EDGE) in bootcamp is able to play in 4K with latest windows 10 and AMD Adrenalin driver. My 5,1 has a RX480 connect to LG 27DU88 via HDMI. No longer need to have Kaby Lake CPU. Another reason to keep your Mac Pro 5,1, LOL.