The 58HAK5350 is a 58 inch 4K TV from Hitachi, launched in the year 2021. It features a 10-bit IPS panel.
The maximum resolution it can achieve is 3840 x 2160 @ 60 Hz with a pixel density of 76 ppi.
Picture Quality
After screen size and resolution, the next important spec of a display that defines picture quality is Color Gamut.
This TV doesn't come with a color gamut specification, so we have to take a guess. As this TV features amassive 58 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 accuracy on this TV should be Lifelike! Meaning it will produce accurate colors AS IT IS intended.
Understanding the Color Gamut Specification
Color gamut specification of a TV is the measurement of the range of colors that the display can display.
A display with poor color reproduction will produce washed out colors that will spoil the immersion.
It is specified in different units - sRGB(most popular), NTSC, DCI P3 etc. It is upto the manufacturer which one they choose.
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, you should look at the static contrast specification as it impacts the picture quality substantially.
Understanding the static contrast specification
A TV with low static contrast ratio will not produce deep 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.
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 show both dark gray and black as black, 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 is rated with a static contrast ratio of 8000:1., well enough to achieve deep blacks and eye-catching visuals. The panel comes with local dimming which is a plus.
HLG (Hybrid Log Gamma), HDR, HDR10 and Dolby Vision are also supported on this TV, so that's a plus.
As for brightness, it is can produce a peak luminance of 350 nits. The backlight used on the panel is Direct LED.
Gaming Performance
If you aren't planning to game on this TV, you can safely 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 take a TV that features the lowest input lag and response time.
Unfortunately, we cannot find the input lag specification for this unit. Now, since this is not a cheap TV, input lag on this TV could be 20ms or below.
What is Input lag ?
This lag is the amount of time at which key-presses or mouse movements changes the content of your 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 features an input lag and response time of less than 20ms.
Dimensions and Ergonomics
Vertically, the TV measures 58 inches and horizontally 51.38 inches.
It is just 3.23 inches thick. Overall this TV weighs 14.35 KGs (including stand). Without stand, it weighs 11.85 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. However, there is no Swivel, Tilt or Pivot feature support on this TV.
Hardware and Audio
The internals of this TV is powered by a 4-Core CPU. However, we could'nt find any information about the total available RAM on this TV.
The Operating System on this TV is Android TV.
For display connectivity, there are three HDMI 2.0 (ARC; CEC) ports on this TV.
To connect USB devices, it includes two USB 2.0 ports. Other connectivity ports include — 1x Satellite In (Main — F-type female), 1x CI+ 1.4, 1x Antenna (RF) (female) and 1x Ethernet RJ45.
For connecting to this TV wirelessly, the manufacturer has provided Wi-Fi (5Ghz + 2.5Ghz), Wifi-Direct, Bluetooth and DLNA.
The Audio unit of this TV is powered by 2 x 10W built-in speakers.
In terms of power usage, on average, it consumes around 112 watts. On standby, it uses 0.5 watts.
For powering this unit, you will need an 220 V - 240 V/50 Hz - 60 Hz outlet.