[doggiehowser]

The 8K moniker is as you surmised - a marketing label.

The real amazing performance are how it handles real world material.

1. 4000 nits. Today, OLEDs are rated for about 750-850 nits. The last flagship from Sony the ZD9 was 1800 nits. Samsung got close to 2000 nits but got it by fudging the tonemapping.

HDR content on discs/movies can be rated for 1000 nits, 2000 nits, 4000 nits, 8000 and even higher. On a display with lower nit ratings, the video processing has to remap (aka tone map) the brighter mastered image to fit in the available display brightness.

The ZG9 will go all the way to 4000 nits with no tonemapping (which I believe will cover a huge majority of movies today).

2. Full Array LED backlight with one of the highest dimmable zones - this allows the display to get close to OLED black levels.

3. Sony X1 grade video processing.. makes motion look incredibly natural (especially for sports) and also one of the best upscaling in the business - making even 1080p look like UHD material.