The 50UQ81006LB is a 50 inch 4K TV from LG, launched in the year 2022. It features a True 8-bit VA panel. It can display a max resolution of 3840 x 2160 @ 60 Hz with a pixel density of 89 ppi.
Picture Quality
After screen size and resolution, the next most important spec to look for in a display is its Color Reproduction Accuracy, which is defined by its color gamut specification.
This TV doesn't come with a color gamut specification, so we have to make an assumption based on its panel type.
Considering the TV features amassive 50 inch screen, it won't come with a cheap panel, so here we can assume its equivalent sRGB coverage to be 90-100% or above. Undoubtedly The color quality on this TV will be Lifelike! It is capable of producing accurate colors out of the box.
Understanding the Color Gamut Specification
Color gamut spec of a display is the measurement of the range of colors that the TV can display.
A TV with poor color reproduction will produce undersaturated colors that will spoil your immersive experience.
Different manufacturers use different units to specify color gamut. Such as — sRGB (most popular), NTSC 1953, DCI P3 Adobe RGB and rec.2020.
But you don't need to worry about that, here is a chart that you can use to choose a TV with good color accuracy.
Now, after color gamut, the static contrast specification of a TV has equally important role in picture quality.
Why its important?
A TV with low static contrast ratio will not produce deep enough blacks and possibly can bleed backlight as below:

The above TV's static contrast is rated 800:1. So make sure you get a TV with a static contrast of >= 1000:1. Ofcourse, More the better.
Other than black levels, a TV with high constrast ratio lets you to see more details. So, resolution and static contrast ratio go hand in hand.
If given a choice, always prefer a FHD TV with high contrast ratio over a 4K TV with low contrast ratio.
There is no mention of this spec in the TV's official datasheet. Again we have to take a guess based on the TV's other specifications. The static contrast ratio of this TV would be surely atleast 3000:1. As you know that this TV comes with a VA panel - VA panels always by nature offer high contrast ratios.
HDR is also supported on this TV in form of HDR10 Pro and HLG (Hybrid Log Gamma).
As for brightness, it is can produce a peak luminance of 250 nits, which is powered by Direct LED backlight.
Gaming Performance
Now if you are planning to use the TV other than using it as a TV — like as a PC monitor or for gaming purposes, make sure to get a TV with lowest input lag. For gaming, both input lag and response time impacts the performance.
Sadly, we cannot find the input lag specification for this unit. Now, since this is not a cheap TV from LG, we can expect an input lag of less than 20ms.
What is Input Lag and Why it matters ?
This lag is the latency at which key-presses or mouse movements changes the content of the TV. For casual Non-FPS games, input lag doesn't matter much.
Although for better experience, look for a TV that has an input lag and response time of less than 20ms.
Dimensions and Ergonomics
The width of this TV is 44.13 inches while its height is 27.68 inches. Coming to thickness, it is 2.25 inches thick.
It weighs 12.1 KGs and 1.1 kgs extra including stand. So plan your space accordingly.
Now, coming to ergonomics — a VESA mount with interface size of 200 x 200 mm is provided for wall-mounting. There is no Swivel, Tilt or Pivot feature support in this TV.
Hardware and Audio
The LG 50UQ81006LB is powered by Quad Core CPU. However, we could'nt find any information about the total available RAM on this TV.
Speaking of OS, the LG 50UQ81006LB runs webOS 22 Operating System.
For display connectivity, there are three HDMI 2.0 ports on this TV.
For connecting USB devices, it includes two USB 2.0 ports. Other connectivity ports include — 1x Satellite In (F-type female), 1x Antenna (RF) (female), 1x CI+ 2.0 and 1x Ethernet RJ45.
Wireless connectivity options on the LG 50UQ81006LB include Wi-Fi (5Ghz + 2.5Ghz), Wifi-Direct, Bluetooth 5.0 and DLNA.
For audio, it is packaged with 2 x 10W speakers.
Speaking of power usage, this TV uses 65 watts on average and 0.5 watts on standby.
For powering this unit, you will require an 220 V - 240 V/50 Hz - 60 Hz outlet.