If your devices only support up to 4K at 60Hz, a "premium high-speed" HDMI cable (18Gbps, HDMI 2.0) is perfectly fine. Again, just avoid really old or thin cables. Early HDMI cables (HDMI 1.4 or older ...
Sometimes the simplest way to understand the cause-and-effect nature of automation is to start with the effect. Scenes are ...