You may notice that the HZ27WA also quotes a colour depth of 1.07 billion colours in Hazro's spec. The screen actually utilises an 8-bit LG.Display H-IPS (LM270WQ1) panel and is capable of producing 16.7 million colours. While the panel does not offer an additional FRC for processing 10-bit sources, this has instead been applied at a controller board level through the use of the two scalers in this model. A 10-bit input would be processed on the scaler side with an 8-bit+AFRC support, but the panel is actually a native 8-bit module. Some other manufacturers, like Eizo for instance, use processes like this to offer "10-bit support" for screens using 8-bit panels. Both manufacturers have commented to us in the past that the end result is pretty comparable in practice really. The difference with the DVI-only edition of the screen (HZ27WC) is that it does not feature the scaler and so cannot offer this additional FRC stage. That model is a standard 8-bit model only offering 16.7 million colour support.
Regardless of how the manufacturers are providing this 10-bit support, you need to take into account whether this is practically useable and whether you're ever going to truly use that colour depth. There is a requirement of your application, operating system, graphics card and software to support a 10-bit colour depth, not just your display. A full 10-bit work flow is still extremely uncommon in the current market so don't get too bogged down with the marketing around 10-bit at this stage.
