That’s incorrect. While it can be assumed that HDR content supports at least 10bit colour, it is not necessary for monitor or content. The main difference is contrast and brightness. SDR is mastered for a brightness of 100 nits and a fairly low contrast. HDR is mastered for brighnesses of usually 1000 or even 2000 nits since modern displays are brighter and capable of higher contrast and thus can produce a more lifelike picture through the additional information within HDR.
Of course you need a sufficiently bright and/or contrasty monitor for it to make a difference. An OLED screen or displays with a lot of dimming zones would produce the best results there. But even a 350nit cheap TV can look a bit better in HDR.
That’s incorrect. While it can be assumed that HDR content supports at least 10bit colour, it is not necessary for monitor or content. The main difference is contrast and brightness. SDR is mastered for a brightness of 100 nits and a fairly low contrast. HDR is mastered for brighnesses of usually 1000 or even 2000 nits since modern displays are brighter and capable of higher contrast and thus can produce a more lifelike picture through the additional information within HDR.
Of course you need a sufficiently bright and/or contrasty monitor for it to make a difference. An OLED screen or displays with a lot of dimming zones would produce the best results there. But even a 350nit cheap TV can look a bit better in HDR.