Because that’s how watching a movie in a theater works. When you turn your head, the speakers don’t move.I don't understand this either - have been googling all morning - why emulate sound coming from the screen?!?!?! Isn't that why I'm using headphones? This function description sounds different than the original description about spatial audio being more like surround.
So if there’s a person on the left of the screen, and you are staring straight ahead, the sound comes in your left ear. But if you turn your head to look at the person on the left, with this feature now the sound comes into both your ears.
The way your brain works, this makes it feel much more immersive than normal headphone audio.