E-Ink. It is the "correct" choice for display technology, and with enough research money put into it, it could replace these abominable light-emitting displays. But what we already have is "good enough", despite all of the hidden costs, and so we're stuck with it.
100% agree. imagine my shock when as a young technology analyst I discovered that E-Ink was a smallcap tech company in Taiwan and basically produced kindle displays, store price tags and that cool double sided phone that one time. I thought it was a huge deal when they managed to do color E-Ink. but no one cared.
Around 2010 I assumed it would a matter of a couple of years until we were reading comic books on our Kindle Color ink tablets.