Questions about latency etc, I don't know answers. But, a couple things.

For my eyes, TV are good average monitors in general. I've used led TV monitors (and plasma tv) for PCs for years (along with normal PC monitors) -- we currently have 5 TVs (27"-1K, 43"-4K, 49"-4K. 56"-1K, 60"-1K) attached to PCs in different rooms. My current main system 43" 4K monitor is an LED TV. It replaces an excellent 32" 2K standard monitor. However, over the years a couple TVs have looked oddly pixelated when viewed up close.

I checked the color rendition on my current 43"-4K TV unit using a tool for the purpose. Its excellent (virtually perfect). Most older TVs as monitors are not excellent. But, most PC monitors are not excellent either.

TVs (and many monitors) have poor "black levels". Dark black areas can look dark gray.

Many are 60Hz refresh. My current one says 120Hz. But, the way I game, over 60Hz does not matter.

To my eyes, 27 inch is the maximum size that works for 1080p (1K) on the desktop. Bigger 1080p screens look pixelated from desktop distances -- but are okay at longer distances.

So, you might want to try it and see for yourself. By the way, brightness is variable using PC settings with my setup (I assume that's generally true). Its also variable using the TV controller. I do cut my brightness on my 43" depending on the use. Just opinions FWIW.