The QN85QN800B is a 85 inch 8K TV from Samsung. It was launched in 2022. It features a True 10-bit VA panel with Anti-glare/Matte finish. It can achieve a max resolution of 7680 x 4320 with a refresh rate of 120 Hz and pixel density of 104 ppi.
Picture Quality
After screen size and resolution, the very next spec of a display that will impact your viewing experience is its Color Gamut.
This TV features 100% DCI P3 color gamut coverage — equivalent to 136.36% sRGB coverage. The color accuracy on this TV should be Lifelike!
Understanding Color Gamut
Color gamut spec of a TV is the measurement of the range of colors that the display can produce.
A TV with poor color accuracy will produce washed out colors that will spoil the immersion.
It is specified in different units - sRGB(most popular), NTSC, DCI P3 etc.
For example, the color gamut of this TV is specified in DCI P3.
But don't worry, below is a chart that will help you choosing a TV with good color accuracy.
After color gamut, you should look at the static contrast specification as it impacts the picture quality the same way.
What is Static Contrast ratio ?
There are two types of contrast specifications for a TV. Static and Dynamic. We are interested in static contrast ratio. Dynamic doesn't matter much.
This defines the intensity of black levels. That is, a TV with static contrast ratio less than 1000:1 may produce black images something like this:

Apart from this, such TVs may suffer from backlight bleeds that will impact your experience — as shown below.

Also note, static contrast ratio and resolution go hand in hand when it comes to details. To put it into perspective, a TV with low contrast ratio will produce less shades of colors, so lesser detail overall.
If given a choice, I will prefer a FHD TV with high contrast ratio over a 4K TV with low contrast ratio.
This TV comes with a static contrast ratio of 10000:1., well enough to achieve deep blacks and eye-catching visuals. For the record, it also comes with local dimming feature which is a plus.
HDR10, HDR10+, HDR10+ Adaptive, HDR10+ Gaming, HLG (Hybrid Log Gamma) and Quantum HDR 32X are also supported on this TV, so that's a plus.
Coming to brightness, the peak brightness the Samsung QN85QN800B can produce is 250 nits. The backlight of this TV is powered by Mini LED technology.
Gaming Performance
If you are planning to use your TV only for content consumption, you can ignore these specifications. But if you are also going to use the TV for playing games or use it as a PC monitor, you would want to take a TV that features the lowest input lag and response time.
Sadly, we cannot find the input lag specification for this unit. But since this is not a cheap TV, we can expect an input lag of less than 20ms.
Understanding Input lag and response time
This lag is the amount of time at which inputs changes the content of the screen. For casual Non-FPS games, input lag doesn't matter much.
Although for better experience, get a TV that has an input lag and response time of < 20ms.
Ergonomics and Dimensions
Now, speaking of ergonomics — VESA mount is supported on this TV with an interface size of 600 x 400 mm. The unit doesn't come with Swivel, Tilt or Pivot support.
The vertical and horizontal measurements of this TV are 75.18 inches and 44.17 inches respectively. Overall it weighs around 55.3 kilograms including stand. Without stand, it weighs 44.32 kgs. So plan your space accordingly.
Hardware and Audio
The core of this TV is powered by Quad Core CPU. However, Samsung didn't provide any info about the RAM on the TV's specsheet.
Speaking of OS, the Samsung QN85QN800B runs Tizen 6.5 Operating System.
For display connectivity, Samsung has provided three HDMI 2.0 ports and one HDMI 2.1 port on this TV.
For connecting USB devices, you will have three USB 2.0 ports. Other connectivity ports include — 1x RS232 (C), 1x Cable/Antenna In (F-type female) and 1x Ethernet RJ45.
For connecting to this TV wirelessly, you will have — Wi-Fi (5Ghz + 2.5Ghz), Wifi-Direct, Bluetooth and DLNA.
Now, coming to power consumption, on average, this TV uses around 227 Watts. On standby, it uses 0.5 Watts.
It supports a power outlet of 100 V - 120 V/50 Hz - 60 Hz.