Launched in the year 2022, the 50UQ91006LA is a 50" 4K TV from LG. It comes with a 10-bit VA panel.
It can achieve a maximum resolution of 3840 x 2160 @ 60 Hz with a pixel density of 89 ppi.
Picture Quality
Now, the very next feature of a display that defines picture quality is Color Gamut.
LG did not provide a color gamut specification for this TV. But don't worry, we have other means to guess that.
Now, since 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 should be Lifelike! Meaning it will produce color accurate images AS IT IS intended.
What is Color gamut ?
Color gamut spec of a TV is the measurement of the range of colors that it can show.
A display with poor color reproduction will produce undersaturated colors that will spoil your immersive experience.
Different manufacturers use different units to specify color gamut. Viz — sRGB, NTSC, DCI P3 Adobe RGB and rec.2020.
But you don't need to worry about that, here is a chart that will help you choosing a TV with good color accuracy.
After color gamut, the static contrast of a TV similarly impacts its picture quality.
The importance of static contrast ratio
A TV with low static contrast ratio will not produce deep blacks and possibly bleed backlight as shown in the below image:

The static contrast ratio of above TV is rated 800:1. So make sure you get a TV with a static contrast of >= 1000:1. More is better.
Also, 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, thus lesser detail overall.
If given a choice, always prefer a FHD TV with high contrast ratio over a 4K TV with low contrast ratio.
However, we were not able to find a static contrast ratio specification for this TV. So we have to make an assumptionagain based on the TV's other specs. For a TV with VA panel, the static contrast ratio will surely atleast be 3000:1 or above So that's a plus.
HDR is also supported on this TV in form of HDR10 Pro and HLG (Hybrid Log Gamma).
Coming to brightness, the peak brightness the LG 50UQ91006LA can achieve is 250 nits. The backlight used on the panel is Direct LED.
Gaming Performance
If you are planning to use your TV just for content consumption, you can safely ignore these specs. But if you are also going to use the TV for gaming or use it as a PC monitor, you should take a TV with the lowest input lag and response time.
Unfortunately, there is no specification for input lag on this TV. But since this is not a cheap TV, input lag on this TV could be 20ms or below.
What is Input Lag and Why it matters ?
This lag is the amount of time at which key-presses/mouse movements changes the content of the screen. For casual Non-FPS games, input lag doesn't matter much.
But ideally, look for a TV that has an input lag and response time of < 20ms.
Dimensions and Ergonomics
The TV measures 50 inches vertically and 44.13 inches horizontally.
It is 2.25 inches thick.
Overall the TV weighs 13.2 kgs including its stand. Without stand, it weighs 12.1 Kgs. So plan your space accordingly.
Speaking of ergonomics — If you plan to wall mount the TV, you can make use of the VESA mount provided with this TV, which by the way has an interface size of 200 x 200 mm. The unit doesn't come with either Swivel, Tilt or Pivot support.
Hardware and Audio
The chipset of this TV is powered by 4-Core CPU. There is no mention about the RAM on the TV's official specsheet.
Speaking of OS, the LG 50UQ91006LA runs webOS 22 Operating System.
For display connectivity, there are two HDMI 2.0 ports and two HDMI 2.1 ports on this TV.
To connect USB devices, it includes two USB 2.0 ports. Other connectivity ports include — 1x CI+ 2.0, 1x Antenna (RF) (female), 1x Satellite In (F-type female) and 1x Ethernet RJ45.
Regarding wireless connectivity on this TV, the manufacturer has provided Wi-Fi (5Ghz + 2.5Ghz), Wifi-Direct, Bluetooth 5.0 and DLNA.
Now, for audio, it is packaged with 2 x 10W built-in speakers.
As for power usage, on average, this TV uses around 69 watts. On standby, it uses 0.5 watts.
It supports a power outlet of 220 V - 240 V/50 Hz - 60 Hz.