Time-of-flight (or TOF) sensors became a hallmark of flagship phones as of 2018. They may enhance 3D perception in these devices for photography or even biometrics purposes. However, they are also now projected to become important in other forms of consumer electronics, autonomous cars and robotics. This may drive their market's value up to US$6.9 billion in 5 years.
https://www.notebookcheck.net/The-time-of-flight-TOF-sensor-market-may-hit-nearly-US-7-billion-in-5-years.454437.0.html
ToF sensor seems to make more sense if put on the selfie camera side for secure face unlock