The 55HAE5350W is a 55 inch 4K TV from Hitachi. It was launched in 2021. It comes with a 10-bit IPS panel.
The max. resolution it can display is 3840 x 2160 @ 60 Hz with a pixel density of 80 ppi.
Picture Quality
After screen size and resolution, the next important specification of a display is its Color Reproduction, which is defined by its color gamut specification.
Hitachi has not provided a color gamut specification for this TV. But don't worry, we have other means to guess that.
Now, since the TV features a big 55 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 will be Lifelike! It is capable of producing color accurate images AS IT IS intended.
Understanding the Color Gamut Specification
Color gamut specification of a TV is a measure of the range of colors that it can show.
A panel with poor color accuracy will produce undersaturated/washed out colors that will spoil your immersive experience.
It is specified in different units - sRGB(most popular), NTSC 1953, DCI P3 Adobe RGB, rec.2020.
But you don't need to worry about that, below is a chart that will help you choosing a TV with good color accuracy.
Now, next in the list is Static Contrast.
The importance of static contrast ratio
A TV with high enough static contrast ratio will produce natural deep blacks while a TV with low contrast ratio (<1000:1) will produce images that might look muddy as shown below.

As you can imagine, this will rob your experience considerably.
Also, a TV with high constrast ratio enables you to see more details. So, resolution and static contrast ratio go hand in hand.
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 produce deep blacks and eye-catching visuals. For the record, it also comes with local dimming which is a plus.
HDR is also supported on this TV in form of HLG (Hybrid Log Gamma), HDR, HDR10 and Dolby Vision.
As for brightness, it can go as bright as 350 nits. The backlight of this TV is powered by Direct LED technology.
Gaming Performance
If you aren't planning to game on this TV, you can 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, we cannot find the input lag specification for this unit. Now, since this is not a cheap TV from Hitachi, 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 your device inputs changes the content of your TV. For casual Non-FPS games, input lag doesn't matter much.
But ideally, get a TV that has an input lag and response time of < 20ms.
Ergonomics and Dimensions
Speaking of ergonomics — VESA mount is supported on this TV with an interface size of 200 x 200 mm. Swivel, Tilt or Pivot features are not supported on this unit.
Vertically, the TV measures 55 inches and horizontally 48.94 inches.
Speaking of thickness, it is just 3.23 inches thick. In total it weighs around 12.9 kilograms (including stand). Without stand, it weighs 10.4 Kgs.
Hardware and Audio
The Hitachi 55HAE5350W is powered by Quad Core CPU. There is no data on the total available RAM on the TV's official specsheet.
The UI on this TV is powered by Android TV Operating System.
For display connectivity, there are three HDMI 2.0 (ARC; CEC) ports and one AV Composite In (Video + L/R) port on this TV.
For connecting USB devices, it includes two USB 2.0 ports. Other connectivity ports include — 1x Satellite In (Main — F-type female), 1x Antenna (RF) (female), 1x CI+ 1.4 and 1x Ethernet RJ45.
Wireless connectivity options on the Hitachi 55HAE5350W include Wi-Fi (5Ghz + 2.5Ghz), Wifi-Direct, Bluetooth and DLNA.
For audio, it is packaged with 2 x 10W built-in speakers.
Speaking of power usage, the TV uses 131.2 Watts on average and 0.5 Watts on standby.
For powering this unit, you'll require an 220 V - 240 V/50 Hz - 60 Hz outlet.