From the linked article:
"The windshield is heavily tinted in its top half, which dulls the panoramic effect somewhat. Sunphobes may welcome the heavy tint, but I think it’s too dark. Can’t please everyone, I guess.
Yes, you can. Make the top half of the windshield electrochromic, like the passenger windows in the Boeing 787, which change from clear to black with the turn of a rheostat dial.
Imagine it: if the sun goes behind a cloud, swipe a finger on the touchscreen and the windshield tint melts away. When the sun returns, swipe again, and the clear glass ceiling fades to black, or anywhere you prefer in between."
Electrochromic windows aren't currently a feature in the Model X. The author of the article was just offering a scenario in which you could "please everyone" with the front windshield tinting.