I wonder if this would be more useful on an iPad.
If Apple were to put FaceID on the iPad, they have to consider the fact that the iPad is a uni-rotational device, and people expect it to work on portrait, landscape, and even upside-down. FaceID might have a problem unless Apple perfected the tech further to adapt to device rotation. Meanwhile, TouchID doesn't have this issue as much, and this thing will work great if Apple decide to push the bezels away on the next iPad.
If Apple were to put FaceID on the iPad, they have to consider the fact that the iPad is a uni-rotational device, and people expect it to work on portrait, landscape, and even upside-down. FaceID might have a problem unless Apple perfected the tech further to adapt to device rotation. Meanwhile, TouchID doesn't have this issue as much, and this thing will work great if Apple decide to push the bezels away on the next iPad.