I recently purchased two Samsung 4K TVs. We currently have the H3 and 3.0 Joey. My wie's TV was installed today on the Joey and the installer used the existing HDMI cable that was attached from the Joey to the prior 2K TV. We do occassionally stream Netflix. Do I need to upgrade to the 4K Joey? Also, do I need a 4K UltraHD and HDR compatible HDMI? Would the 4K Joey affect in any positive way the picture quality while viewing non 4K content?