767s can be retrofit to that state though, and some airlines have done so. This is a rendering of a cockpit retrofit for a 767 freighter commissioned by UPS: https://www.rockwellcollins.com/sitecore/content/Data/News/2...
Finally, the dynamic lighting range of the displays is unholy; I've been in the cockpit at night when the mechanic working on something cranked up the brightness to full (he warned me first) — it felt close to staring into an LED flashlight. There's plenty of oomph there to make it readable in daylight.
Before that, screens were simply matte, I think. And now there are matte films that you can slap on the smooth glareful screen (much recommend).