I've looked at that lightspace article and the cie graph representation of the issue and it pretty much looks as bad as I thought. 😱
I wish I knew this year ago when I was shopping for an oled tv, I would get an lcd instead. With all the constant complaints about mostly irrelevant stuff about these tvs such as low level grey uniformity (vertical lines and blobs, who even sees these in real life content), motion (which looks completely normal to me), burn in (that doesn't happen with normal use) etc, you would think that people on this website would talk more about things such as badly oversaturated darker colors that are clearly visible in a side by side comparison, bad white point shift at an angle and requiring custom white point and perceptual matching to a reference display due to wide gamut and metameric errors.
So you need ColourSpace LGN license for lut editing?
Post-production houses have many different monitors in the same room, so all have to display the same colors as close as possible.
If the main reference monitor has desaturated primaries, then others without that problem will display the content differently.
In that case, you can use ColourSpace and apply a filter to desaturate the secondary RGB OLED or WRGB OLED available to the same room.
Usually, Sony X300 is commonly used as a reference, and it's not suffering from that issue with de-saturation in lower luminance levels.
EIZO CG319 (~7K$), which is LCD, doesn't have a problem also, as you can see below, it can retain saturation to lower luminance levels; only at the lowest (8% to the pictures below), it will have a de-saturation.
1000p SDR REC.709 Verification:
EIZO CG3146 (31K$), has no problem also:
LCD in the consumer market are not good displays, as they are suffering from much more issues compared to WOLEDs.
So WOLED's, especially LG, which has the richest calibration capabilities for calibration in the global TV market, is the best option as a consumer TV, compared to other TVs available to the market.
Panasonic WOLED will require an external LUT box to able to reach the performance of LG in SDR, and 4K LUT Box is very expensive (see the price of Lumagen PRO, more expensive from the TV).
Sony WOLED can't reach the performance of LG/Panasonic, and if you will buy an external LUT Box because you can't disable the Sony processing to the signal, it doesn't provide a native gamut as an option, any colorspace option is including Sony processing enabled.
The ideal display is the one that has pixel-per-pixel control (+1 to OLED), no ABL/APL (+1 to OLED up to 150 nits), no local dimming (+1 to OLED), no significant shifting if you don't watch dead-centered (+1 to OLED).
Consumer LCD has all these problems.
Professional LCD doesn't suffer from local dimming.
It's not available a perfect TV/monitor; even Sony X300 has many problems... any display tech/models have positive/negative stuff.
It's not possible to buy a perfect monitor; even if you search for a 20-30K$ 31-inch post-production monitor, you will find issues also.
LG WRGB OLEDs in the consumer world are not perfect also.
Still, for the price and for all these stuff a consumer can get, it's insane that they are available all these features at this price range in the consumer market.
Dolby Monitor (50K$) had a more significant white point problem than the issue you see with WRGB OLED.
The new RGB JOLED has a more significant issue than WRGB OLED with metameric failure.
As you can see below, LG WRGB OLED with ColourSpace and 3D LUT for SDR, you can get better measurements compared to a very expensive professional monitor (which is only 31 inches max, so you can't use it in a living room)
LG WRGB OLED SDR REC.709 1000p verification:
ColourSpace user with LG OLED have posted a lot of times 1000p verification of SDR REC.709:
The de-saturation LUT manipulation filter is not required for consumers, its for post-production.
Consumer need ColourSpace HTL (for X-Rite) meters or HTP (for hign-end meters). HTP can manipulate the LUT.