The 75U6G is a 75 inch 4K TV from Hisense, launched in the year 2021. It features a True 10-bit VA panel. It can achieve a max resolution of 3840 x 2160 with a refresh rate of 60 Hz and pixel density of 59 ppi.
Picture Quality
After screen size and resolution, the next most important specification of a display is its Color Reproduction Accuracy, which is defined by its color gamut specification.
This TV doesn't provide a color gamut specification, so we have to take a guess.
Considering the TV features amassive 75 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! Meaning it will produce color accurate images by default.
What is Color gamut ?
Color gamut spec of a display is a measure of the range of colors that the display can show.
Meaning, this specification tells the ability of a TV to produce accurate colors. A TV with low gamut coverage will miss out on some colors (such as deep red), thus producing a "washed out" picture.
It is specified in different units - sRGB,sRGB (standard RGB), NTSC, DCI P3 Adobe RGB, rec.2020. It is upto the manufacturer which one they choose.
But don't worry, below is a chart that will help you choosing a TV with good color accuracy.
Now, after color gamut, the static contrast of a TV similarly impacts its picture quality.
Why its important?
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 < 1000:1 may produce black images something like this:

Note that, such TVs are also prone backlight bleeds that will affect your experience — as shown below.

Think of static contrast as another dimension to details — just like resolution. To put it into perspective, a TV with low contrast ratio will show both dark gray and black as black, so lesser detail overall.
If given a choice, always 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 8000:1., good enough to achieve deep blacks. The panel comes with local dimming which is a plus.
Dolby Vision, HDR10, HDR10+ and HLG (Hybrid Log Gamma) are also supported on this TV.
Coming to brightness, the peak brightness the Hisense 75U6G can achieve is 600 nits with the help of Direct LED (Full-Array Local Dimming) backlight. This amount of brightness is good enough even for a room with sun's rays in!
Gaming Performance
If you are planning to use your TV only for content consumption, you can ignore these specifications. But if you are also planning to use the TV for gaming or use it as a PC monitor, you would want to get a TV that features the lowest input lag and response time.
Sadly, Hisense did not specify the input lag on this unit. But since this is not a cheap TV from Hisense, input lag on this TV could be 20ms or below.
What is Input lag ?
This lag is the amount of time at which your device inputs changes the content of the TV. Though, this won't matter much if you aren't into competitive/FPS games like call of duty.
But ideally, get a TV that has an input lag and response time of < 20ms.
Ergonomics and Dimensions
Now, coming to ergonomics — VESA mount is supported on this TV with an interface size of 600 x 300 mm. The unit doesn't come with either Swivel, Tilt or Pivot support.
Vertically, the TV measures 75 inches and horizontally 65.98 inches.
It is just 3.35 inches thick. Overall the TV weighs 29.4 kgs including stand. Without stand, it weighs 28.8 Kilograms.
Hardware and Audio
The Operating System on this TV is Android 10.
For display connectivity, there are four HDMI 2.0 (b; ARC; CEC) ports and one AV Composite In 3.5 mm jack port on this TV.
To connect USB devices, it includes two USB 2.0 ports. Other connectivity ports include — 1x Cable/Antenna In (F-type) and 1x Ethernet RJ45.
For wireless connectivity, the manufacturer has provided Wi-Fi (5Ghz + 2.5Ghz), Wifi-Direct and Bluetooth.
For audio, Hisense has provided 2 x 15W built-in speakers on the 75U6G.
In terms of power consumption, on average, it uses around 210 watts and on standby, it takes 0.5 watts.
It supports a power outlet of 100 V - 120 V/50 Hz - 60 Hz.