If you want confirmation coming directly from the OnePlus CAD stations, though, and want to know why the company decided to put this button here, or drill that hole there, today you are in luck.

Further allusions to Samsung’s design are the top bezel being shaved to the minimum, and the curved screen sides. On the other hand, these are logical design decisions if you want to take full advantage of the hole-in-active-area (HIAA) implementation. 

As to the pressing question what would the fourth camera do, given that the trifecta of sensors stacked in the middle is probably the good ol’ main + telephoto + ultra wide-angle cameras, the leaked document indicates that it will simply be a time-of-flight (ToF) camera for better depth perception. Do you like what you see so far with the OnePlus 8 series design direction?