Is 8K is now the ultimate goal? They said, beyond that, most people can’t see a difference, even in a movie theater. So what now?
Watching Ultra HD 4K content—with 2,160 lines of vertical definition—on a Ultra HD 4K TV set is impressive. But 8K—four times the total pixels—is so incredibly realistic that it feels like you’re looking through a window into real life, as demonstrated by this film screened by the Japan Broadcasting Corporation (NHK).
The 8K resolution covers almost the entire range of vision (induced visual field) which influences the human grasp of spatial coordinates. The pixel structure remains invisible to the unassisted eye even when viewed across a horizontal angle.
Tidbits and more at Gizmodo.com.