As is known, Google had only one reversing camera for each large and small pixel model. The company used AI and Machine Learning to create photos that compete with two reversing cameras, such as the iPhone XS, or three reversing cameras, such as the Huawei P20 Pro. A second camera could be used for something other than photography.
The drawings of the unpublished 4 XL also show an oval hole display for two selfie cameras like the new Galaxy S10 Plus. As you know, the Pixel 3 lacks a notch, while the Pixel 3 XL is one of the largest found on any phone.
Curious, the drawing shows no fingerprint reader on the back. This omission may indicate that the next pixel phone has a fingerprint reader such as OnePlus 6T and Galaxy S10 on the screen.
Of course, the drawing was not verified, so it should be taken with a grain of salt. That said, it's still fun to think about it.
Google did not respond immediately to a request for comment.