https://www.engadget.com/apple-music-dynamic-head-tracking-155139219.html
Dynamic head tracking is now available in Apple Music
Their eyes darted around. From side to side: watching for obstructions or taking in the view, the traffic, that passer by, that pigeon. Some had it down to a fine art. Peripheral vision became a new skill. But they all walked awkwardly, stiff, their heads fixed. They didn’t dare move. It was like their hearables locked their heads in place. They knew the slightest shift could set it off and walked accordingly. Carefully. You could see it happen. The slightest movement, turning the head towards the shop window and they’d wince as the ad started. It was known as brandlash.