So with my Sony X800 BD player and my BenQ LK970 projector. When i play a blu ray movie and hit "Display" on the X800 remote it says SDR. But when i hit "Display" with a 4K movie it says HDR->SDR. I think maybe the 4k movie looks better but what does this mean? My BenQ LK970 projector is not an HDR projector.