It continues:
Pixel 2 XL’s pOLED display has a ‘black smear’ problem that’s definitely worse than average
On another note MKBHD gave more indepth than usual review.
https://www.theverge.com/2017/10/17/16486108/google-pixel-2-xl-review-android-phone-cameraAfter multiple reports of possible screen burn-in on the Pixel 2 XL, we are pulling our score for this device until we have more information. We have reached out to Google, but as of this writing the company has only said that it's "investigating."
Since publishing our original review, our unit has developed ghostly versions of the main Android navigation buttons at the bottom, visible when you're looking at a gray background. Several other outlets have reported the same on their review units. That's potentially a telltale sign of screen burn in, which can affect any OLED screen over time — but usually that time is measured in months and years, not weeks. It's possible, however, that it's simply a temporary "image retention" and not a permanent issue.
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Until we know one way or the other, we're temporarily removing our score on the Pixel 2 XL. In the meantime, we can't recommend buying this phone until we can definitively say that the screen isn't permanently damaging itself within weeks of buying it.
Pixel 2 XL’s pOLED display has a ‘black smear’ problem that’s definitely worse than average
On another note MKBHD gave more indepth than usual review.