Putting a camera under the display isn't all that difficult, yet getting good camera performance is and why many choose to go the "hole punch" route. The one (and possibly only) smartphone you can buy today with the under the display is the Axon 20 5G but it has both terrible camera performance and often you see the camera though the display which can ruin your experience if you're watching a movie on a plane. I'd love for the next iphone to go notchless but don't think it's going to happen with the iPhone 13 because apple is rarely first. Like the 2020 iPad Air, Apple will most likely bring back touch ID but in the form of the unlock/power button. I could see them ridding the phone of the port which would mean they wouldn't need to include a charging cable and could sell more magsafe chargers.