One of such new features is the ability to power down your iPhone without the sleep/wake (power) button. Impossible you may say right?
Well, this is not something you will likely need to use often. But you will find it handy if you drop your phone, have a malfunction, or encounter some other issue with the sleep/wake (power) button (called the side button on the iPhone X). I also find this feature very useful when I want to stylishly power off my phone without struggling with the power button.
This new feature can also be very useful for people who make use of accessibility features, like those who may have difficulty squeezing buttons.
How to turn off your iPhone without the power button.
Navigate to Settings, swipe down to and tap Shut Down and then swipe the power off slider from left to right.