The 70UQ7590PUB is a 70 inch 4K TV from LG, launched in the year 2022. It comes with a True 8-bit VA panel. It can achieve a max resolution of 3840 x 2160 @ 60 Hz with a pixel density of 63 ppi.
Picture Quality
After screen size and resolution, the very next feature of a display that defines picture quality is Color Gamut.
This TV doesn't provide a color gamut specification, so we have to make an assumption based on its panel type. Now, since the TV features a big 70 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. The color quality on this TV should be Lifelike! Meaning it will produce accurate colors by default.
Understanding Color Gamut
Color gamut specification of a TV indicates the range of colors that the TV can display.
A display with poor color accuracy will produce undersaturated/washed out colors that will spoil the immersion.
Different manufacturers use different units to specify color gamut. Viz — sRGB (standard RGB), NTSC 1953, DCI P3 to name a few.
But you don't need to worry about that, below is a chart that will help you choosing a TV with good color accuracy.
Next in the list of important specifications that will impact your experience is Static Contrast.
Understanding the static contrast specification
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.
Static contrast defines the intensity of black levels. That is, a TV with static contrast ratio less than 1000:1 will produce black images something like this:

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

Also, a TV with high constrast ratio lets you to see more details. So, resolution and static contrast ratio go hand in hand in a sense.
We couldn't find a static contrast ratio specification for this TV. Once again we have to make an assumption. For a TV with VA panel, the static contrast ratio will surely atleast be 3000:1 or above.
HDR is also supported on this TV in form of HDR10 Pro and HLG (Hybrid Log Gamma).
Coming to brightness, it is capable of producing a maximum luminance of 250 nits, which is powered by Direct LED backlight.
Gaming Performance
If you are planning to use your TV only for content consumption, you can safely ignore these specs. But if you are also planning to use the TV for playing games or use it as a PC monitor, you would want to get a TV with the lowest input lag and response time.
Sadly, there is no specification for input lag on this TV. Now, as 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 key-presses or mouse movements changes the content of your display. For casual Non-FPS games, input lag doesn't matter much.
Although for better experience, look for a TV that comes with an input lag and response time of less than 20ms.
Ergonomics and Dimensions
Speaking of ergonomics — VESA mount is supported on this TV with an interface size of 400 x 400 mm. However, there is no Swivel, Tilt or Pivot feature support on this TV.
The TV measures 70 inches vertically and 61.5 inches horizontally. It is 2.4 inches thick. It weighs approximately 28.4 kgs, another 0.4 kgs including stand.
Hardware and Audio
The TV is powered by Quad Core CPU. However, we could'nt find any information about the RAM on this TV.
Speaking of OS, the LG 70UQ7590PUB runs webOS 22 Operating System.
For display connectivity, there are two HDMI 2.0 ports on this TV.
To connect USB devices, it includes one USB 2.0 port. Other connectivity ports include — 1x Cable/Antenna In (F-type female), 1x RS232 (C) and 1x Ethernet RJ45.
For connecting to this TV wirelessly, the manufacturer has provided a 5Ghz Wi-Fi, 2.5 Ghz Wi-Fi, Wifi-Direct, Bluetooth 5.0 and DLNA.
The Audio unit of this TV is powered by 2 x 10W speakers.
In terms of power consumption, on average, this TV uses about 156.16 Watts. On standby, it uses 0.5 Watts.
For powering this unit, you will require either a 110V or 220V outlet @ 50Hz-60Hz.