Those rumors of the Pixel 4 sporting hand gesture control just became more tangible. Ice Universe has obtained photos that reportedly show the detached bezels for the Pixel 4 and Pixel 4XL, including a rather conspicuous ovoid hole on the right side. Given that this hole hasn't been visibly occupied by cameras or other visual sensors in previous leaks, this appears to be a cutout for the Project Soli radar that would let you perform gestures without poking at the screen.
The other holes are effectively spoken for. You could expect dual selfie cameras on both Pixel models, a central speaker and what's believed to be a face recognition or depth sensor.
Outside of Google's teaser, you're unlikely to hear official news about the Pixel 4 and its sensor layout until early fall. Should this leak prove accurate, though, it could represent one reason why notched displays appear to be vanishing on higher-end Pixels -- the sheer number of sensors makes it impractical. Any aesthetic improvement would represent a mere bonus.