Ok, thanks. That may very well be the case. Like the Panasonic UHD players. I was thinking that the VS10 engine would have a provision for being used on a 4K non-HDR display. Perhaps it would just drop back to 1080p SDR. I don't have one to try. I thought they existed in the early days of 4K though. All 4K displays these days appear to be HDR ready.