I was initially more excited about this mirror than I am now. It certainly has potential but the issue I'm wondering about is how awkward it will be to refocus on the screen verses the exterior view. Your eyes are essentially focused at infinity whenever looking out the window or through any of the 3 normal mirrors. It's only when you look inside the car that your eyes refocus, to read your speed on the instrument cluster for example. Looking at this rearview screen requires your eyes to refocus as well. This may be disconcerting or, as the reviewer put it in this video, creates "cognitive dissonance".
https://youtu.be/ajY1pfrxLDE?t=2m43s
He likes the high resolution of the screen and the ability to look beyond cargo or people. He dislikes having his eyes "adjust" and he "hopes they can solve that." It's of course physically impossible to change the focal distance of a rearview mounted screen. There are some tricks you can do with a HUD screen to extend the focal distance, but not a screen mounted in the rearview mirror position.