The HDR on this monitor is technically there but you will not be able to notice it. Plus the 1ms thing, while technically achievable is of no use in games because of picture distortion. The real number whilst still being able to see everything properly is around 4.65ms which is still pretty impressive. Lastly there is a huge difference between 4k and 1440p on a large tv screen, there is not on a 27 inch monitor. 1440p looks amazing on a good monitor like this one. Just forget about HDR on this monitor, it's not happening.