Someone got a Huawei Mate 30 Pro unit early. The white plastic is used to hide the design, but it doesn’t do a very good job – the thing to notice here is the curvature of the screen and the new notch hardware.
The Mate 30 Pro has what the Internet has been calling a “waterfall screen”, the left and right side curve 90°, much more than a typical screen with curved sides. Perhaps, EMUI will use these for gestures or other tricks (remember when the Galaxy Edge emulated a side-mounted shutter button?). Good palm rejection is a must, however.
The notch has been redesigned with second generation Face Recognition hardware. It looks like a triple camera, but it may actually be a Time of Flight (ToF) system with a light emitter and sensor. For comparison, here’s what the Mate 20 Pro 3D scanner looks like – it’s based on a different system called structured light.