Glare is a zero issue. I specifically was looking for the glare on the screen. The pano roof was open and the sun was exactly behind the car at an angle that would put maximum sunlight on the screen when I was checking for it. The screen had no readability problems. I even pointed it out to my wife and the other lady sitting in the car for the tech demo and both didn't even realize the sun was on the screen until I pointed it out. For what ever reasons, the photos we see of the screen really over emphasizes the glare on the screen. To my eye, there was absolutely no problem with full mid-day California sunlight streaming in through the pano roof at the worst possible sun angle (directly behind the display screen).
Photographing anything behind glass without some sort of reflection or glare is nearly impossible. However, human brain does some complex processing of the image to make it much clearer and ignore the reflections to a certain extent. Glares that you see on pictures of the screen may be completely unnoticeable to the human eye.