- Apple TV don't switch between HDR, Dolby Vision and non HDR
- LG 2016 OLED support only Dolby Vision with 30 FPS
- Apple TV 4k will use as default 60 FPS HDR over 30fps Dolby Vision (because the Apple TV won't switch automatically mode)
- The HDR processing of the Apple TV 4k seems currently very bad. That means HD content can look very bad on the new Apple TV (because AT4k does not switch modes...)
- You can't use the image optimization of your receiver, because the AT4k sends always 4k HDR/Dolby Vision
Source: https://www.theverge.com/2017/9/21/16341876/new-apple-tv-4k-review-2017
- LG 2016 OLED support only Dolby Vision with 30 FPS
- Apple TV 4k will use as default 60 FPS HDR over 30fps Dolby Vision (because the Apple TV won't switch automatically mode)
- The HDR processing of the Apple TV 4k seems currently very bad. That means HD content can look very bad on the new Apple TV (because AT4k does not switch modes...)
- You can't use the image optimization of your receiver, because the AT4k sends always 4k HDR/Dolby Vision
Source: https://www.theverge.com/2017/9/21/16341876/new-apple-tv-4k-review-2017