That's true. And we do keep hearing about advances with QD, so I'm optimistic about the future. LG has deservingly been able to rest on its OLED laurels in the retail space for a few years, while now others either are finally caving and adopting their technology or pushing the limits of LCD by using QD filters, more dimming zones, etc. But Samsung's unwillingness to properly address the market has set progress back at least a year.
I would love nothing more than for gullible buyers to subsidize my 4k-TV-that-uses high-quality-chemistry through the purchase of overpriced-8k-sets-that-use-older-chemistry. Unfortunately, capitalism doesn't work that way, and all "premium" features (whether actually premium or not) get lumped into a single overpriced top-tier product level.
All in all, though, I guess apparently it's not hard to pack smaller pixels of existing topology into current screen sizes, so if nothing else best case 8k gets instantly commodified and we don't end up being forced to pay too much extra for a feature that doesn't offer any actual perceptual benefit.