This is impressive. Though perhaps not very useful. Humans (and animals in general) are quite bad at precisely locating sound anyway. We only have two input channels, the right and the left ear, and any location information comes from a signal difference (loudness usually) between the two.
I'm sorry, but this is not accurate at all. Using "only" two signals, humans are quite good at localizing sound sources in some directions: Concerning absolute localization, in frontal position, peak accuracy is observed at 1÷2 degrees for localization in the horizontal plane and 3÷4 degrees for localization in the vertical plane (Makous and Middlebrooks, 1990; Grothe et al., 2010; Tabry et al., 2013). from https://w…
> Yet I'm usually not even noticing whether a video has stereo or mono sound. So I highly doubt that ultra precise OLED loudspeakers would make a noticeable difference.