Multitasking gestures have been updated, too. To bring up the app switcher, swipe up and hold your finger on the center of the screen for a few seconds. To switch quickly between apps, swipe left or right across the very bottom of the screen, where the bright bar lives.
There’s more. Siri is still a press-and-hold action, but it’s now on the side (sleep/wake) button. Likewise, Apple Pay’s double-tap gesture still applies, but you now do it to the side button. Taking a screen shot now requires that you press the volume up button and the side button simultaneously. To force the phone to shut down, you press and hold the side button and either one of the volume buttons. To force a reboot of a hopelessly stuck phone, you now need to do the iPhone X version of control-alt-delete — pressing the volume up button, followed by the volume down button, followed by a press-and-hold on the side button.
Apple says that certain sunglasses may defeat Face ID—it all depends on if they have a coating that blocks infrared light in the 940 nanometer range, so you’ll need to test your sunglasses to be sure that they work.
The iPhone X camera is slightly more advanced than the one on the iPhone 8 Plus, most specifically its telephoto camera module: It’s got a wider aperture (ƒ/2.4 versus ƒ/2.8 on the iPhone 8 Plus), and it’s got built-in optical image stabilization, which is only available on the wide-angle camera on the iPhone 8 Plus. And of course, the iPhone X camera can also shoot portrait images via its front-facing selfie camera, thanks to all the same depth-sensing technology that lets it run Face ID.
One other interesting note: This is the first iPhone to support magnetic cases. Apple is, of course, selling a $100 folio case of its own that takes advantage of the built-in sensor to put the phone to sleep when the folio’s cover is closed, and wakes it up when the cover is opened.
I’m also curious to see what new apps will be built to take advantage of the depth-sensing features of the front-facing camera on the iPhone X.