There has been one innovation, the SED: https://en.m.wikipedia.org/wiki/Surface-conduction_electron-emitter_display https://en.m.wikipedia.org/wiki/Surface-cond

There has been one innovation, the SED: https://en.m.wikipedia.org/wiki/Surface-conduction_electron-emitter_display https://en.m.wikipedia.org/wiki/Surface-conduction_electron-... In this technology, each pixel has its own tiny electron emitter, thus the display is like a grid of tiny CRTs. It allowed for CRT-quality contrast and color reproduction but with the size and weight of an LCD system, with similar power draw if not less. But LCDs are cheaper to produce, and they just sucked all the oxygen out of the market.