Look for assistance. I can't get my Netflix to run at my monitors native resolution of 2560x1440. It only runs at 1080P.
I have Netflix ultra HD, with a Kabylake 7100 cpu using the iGPU. I have windows 10 and am running Netflix thru Edge. I thought that was all the requirements. Although I don't know if Netflix lets you view their content at an intermediate resolution (i.e. 2560x1440).
With that said, I only have a 15Mbps DSL connection. My motherboard is a Z170 series. And am using an HDMI cable and not display port to drive my display. Although I thought it wouldn't matter.
Desktop: Skylake 6600K, GTX 660, Samsung 950 Pro, GA-Z170M-D3H
Garage mini PC: Kabylake 7100, X25-M g2, ASUS B250I, Antec ISK 110