In short: DisplayMate has not yet released its full, in-depth review article for the Google Pixel 3 and Pixel 3 XL. But DisplayMate has said in a tweet today that the OLED Panel on the Google Pixel 3 XL has achieved the "highest A+ Rating" it has ever given for a smartphone. Which is pretty impressive, and that means that it has beaten the Samsung Galaxy Note 9. That is no small feat, though we also are not sure if this is an LG or Samsung OLED panel right now, and if it is an LG panel than that makes this even more impressive.
Background: Typically when DisplayMate comes out with reports on new displays for new smartphones, the latest Samsung flagship becomes the best mobile display ever, beating out the previous Samsung flagship. So to see the Google Pixel 3 XL beating out Samsung is a pretty big deal. Seeing as the no other manufacturer has scored the highest A+ rating ever by DisplayMate. That also means that Google has fixed those display issues that it had last year on the Pixel 2 XL. Some of you may remember that the Pixel 2 XL had issues with the blue shift, and screen burn in. Not to mention the colors were somewhat dull. Google did adjust this stuff in a software update though. But it looks like those issues are completely gone this year.
Impact: DisplayMate says that it will be publishing its full shoot-out in-depth review article on the Pixel 3 XL on October 15, so you'll have to wait until next Monday to get the full details on how the Google Pixel 3 XL has done. But all things are looking pretty good right now. The Google Pixel 3 and Pixel 3 XL are both up for pre-order right now and will be shipping beginning October 18, starting at $799 for the Pixel 3 and $899 for the Pixel 3 XL.