Leaked images showed that the Xiaomi Mi Mix 2s will put its selfie camera in the top right corner to enable a uniformly thin bezel all around the screen. However, the authenticity of that image came into question after yesterdays leak that showed the rear camera in a different position.
There is now video evidence now that the selfie cam will be in a little notch in the corner. As far as notches go, this one is by far the most inoffensive, its about the size of a status icon.
Unfortunately, we dont see the bottom of the screen in this video. Leaked images of the front show that the thicker bottom bezel of the first two Mix models will be gone.
This older video does show the bottom of the screen. Xiaomi has gone for an iPhone X-style interface – the Mi Mix 2s will not have on-screen buttons, but instead rely on gestures (there will probably be a toggle to go back to buttons, MIUI loves to offer tweaks to its users).
As for an under-screen fingerprint reader, that rumor has been conclusively put to rest (you can see its on the back in yesterdays leak).