Never said it necessarily was otherwise. Just like LEDs, there are a variety of organic and inorganic designs competing.
That is in fact the entire thing
That's not emissive, it's just using it as a filter, like any "quantum TV" you'd see in a big box store. True emissive QD is pure SF at the moment, nobody has managed to concoct a substance that produces visible spectrum light, let alone lab test a complete working device as simple as a single monochrome pixel.
None of the technologies we're discussing do
Look, I agree LETs would be a noticable bump up over LEDs in performance, but they're far from the only variation on LEDs, or even the most radical.