This is for someone who wants both the sharpness of 4K and the smoothness of a high refresh rate, on a screen big enough to feel immersive. At 31.5 inches, you get a lot of real estate — games and movies fill your view without needing multiple monitors, and you can tile windows side by side for work without cramping.
The screen refreshes 144 times per second, which is triple what most TVs do and means fast games feel fluid without that stuttery look. It's also 4K, so individual pixels disappear and textures in games look crisp. Lenovo somehow got the pixel response time insanely low for an IPS screen, so you won't see ghosty trails behind moving objects.
The HDR label is mostly for the box — it'll display an HDR signal but won't give you those punchy bright highlights real HDR delivers. Treat it as a very bright standard screen.