I am obsessed with Vector computing and I recently became the lucky owner of a Vectrex.
Projects like the VecFever, and PiTrex, exist to make it possible to combine vector displays with much more modern CPU technology, allowing emulating even old Vector arcade titles like Star Wars or Battlezone.
It is criminal that Vector Computing never took off past the 1980s, and has died. Nothing, not even OLEDs (sorry Vectrex-Mini guys!) can replicate the beauty of phosphor glow.
Speaking of amazing forgotten lighting effects, the techniques for the cool lighting effects used in Don Bluth films (and his games like Dragons Lair) are also forgotten/unused and I find them analogous to vector displays.
I find the death of Vector Displays and the cool display tech Don Bluth did to be great examples of "Worse is Better" and counterexamples to the idea that progress overtime inevitably makes things better.
I wanted a TechTronix vector computer super bad, and still do, especially the one's with the fast 3D and color add-ons.
I'll drop a few motivating videos:
0. https://www.youtube.com/watch?v=M98VOoGFLL8 (TekTronix 3D/Color stuff)
1. https://www.youtube.com/watch?v=8Dv15YRAmzM
2. https://www.youtube.com/watch?v=j60DV0Ujp_E