An old idea slowly becoming reality

Sunglasses that blot out just the sun:

"... each lens is an LCD that creates a dark box over the sun, blotting out the biggest source of glare and allowing the rest of the glasses to remain rather less tinted. ..."

I had a similar idea nearly 20 years ago for a car windshield/windows that would do the same thing, and prevent overly-bright oncoming headlights from blinding you. My imaginary version had a dial on the dashboard, so you could adjust the tint level, and it even had a lock-out feature so that law enforcement could disable it when approaching a stopped vehicle.

I knew this kind of device would eventually exist in some form, but never became involved in any way as a part of making it happen.

Ideas are worthless. Execution is everything.