I'd say 8k would be the minimum for that.

Unfortunately on many sites with a supposed tech savvy public "everyone" will start to yell that it's just a conspiracy of vendors and that even 4K is nonsense because your eyes can't possibly see it. They'll show fancy graphs and link to wikipedia articles that supposedly prove that 4k, let alone 8k on desktop screen sizes (roughly 20" to 30") is completely nonsense.

Maybe vendors are picking up some of these sentiments and maybe this is in part holding back progress.