@vex714: @TheHuskyK9: Im no video guru but I thought the human eye can only really detect clarity up to HD 1080p. Am I wrong? Cause If thats true I dont see the point even for a 4k screen.

@CCoyote: If you go from a TN panel to a good quality IPS or plasma the biggest difference is going to be the color fidelity, though the higher pixel density makes things look much clearer. I wouldn't trade my 1440p screen for a 1080p for any reason.

@Samael_Morningstar: Visual acuity is measured as angle, and is usually at 1 arcminute to differentiate between two points. At 1' distance ~300PPI is enough for most, which many 5" 1080p phones reach, 720PPI for people with perfect vision.

@Samael_Morningstar: For comparison most people watch their monitor at 2.5' which would need a PPI of ~115 for the average human, and ~300 PPI for the people with perfect vision. A regular 1080p 25" monitor has ~72PPI, my 1440p 25" monitor has 116 PPI.

@Samael_Morningstar: it's not all about resolution, it's about pixel density (PPI) and distance from TV. Higher values = Diminishing returns.
https://youtu.be/1unkluyh2Ks
e.g. you can see 4K on computer, but won't notice anything with 1080p TV.

@Samael_Morningstar: Source for most of that: https://wolfcrow.com/notes-by-dr-optoglass-the-resolution-of-the-human-eye/

PPI = Pixel per Inch = measurement of Pixel density

Visual Acuity = https://en.wikipedia.org/wiki/Visual_acuity

@Samael_Morningstar: I think that's what it is. Sure there's some movies worth watching in higher resolution, but how many times can they do it?

2K < 4K < 8K < 16K?

Some smart tvs do like this weird thing where you can tell the FPS increases.

@CCoyote: @vex714: @Samael_Morningstar: who needs tv when you have television