If I use my Xbox One (base model, not S) for both gaming and as my main Blu-ray player, is there any downside to just leaving that HDMI input in Game Mode? Some of your earlier answers indicate that it's an imperceptible difference, but I noticed that some of the picture options are disabled in Game Mode so I'm not sure if the TV is overriding them.
I also noticed that playing a 4K video on Netflix through the TV app made the brightness increase. In your Settings section it sounded like I would need to manually adjust brightness for HDR; was an auto-adjust patched into the TV? Or was changing brightness manually just for playing HDR games but the TV apps adjust themselves?