Contrary to a popular misconception HDR has no direct tie with brightness. You can have HDR with just 500cd/m2 which will be miles better than what some 1000cd/m2 displays are showing because of higher contrast ratio and better color reproduction - cue OLED vs LCD for example. HDR is about range, not top figure of said range.Is it just me? I'm starting to think the more HDR range a display provides, the more fatigue your eyes will experience, or do you eventually get used to it?
I feel that a HDR monitor with lower nits but better black levels could in fact be considerably more usable than that which shines with 1000+ cd/m2 straight into your face. However this means that we have to wait for OLED monitors since even VA LCD won't be able to reach HDR contrast ratios without extending the top brightness to what can be unpleasant levels.