Someone, like the last year Pixel 3, leaked the hands-on video of the Pixel 4. This video comes from Malaysia, where a retailer somehow got the device prior to the official launch.
If you see the video, the device somehow is tall and looks like the Pixel 4 XL. The video starts with the booting of the device. While the system boots up, you can see the warning. This warning pops up when the bootloader of the device is unlocked.
The top bezel of the device is huge. This is because the top bezel holds all the sensors that are required by the face unlock sensor. Let me remind you, Android 10 supports separate face unlock hardware, unlike the ones made by using the camera for face unlock by OEMs.
The backside of the device is completely glass, which means, this device is going to be premium.