I agree completely. Legitimizing storytelling with dragons in such a wide-reaching, cultural way meant that people who “didn’t watch stuff like that” were constantly being told they were missing out and when they gave in, found out that they had been.
I think The Walking Dead helped to a degree, too. That very much legitimized the horror aspect of genre, so now you have fantasy and horror as two of the biggest shows of the last 10 years - arguably thee two biggest - and it seems right now that Altered Carbon could be where the Sci-Fi edge of genre legitimizes in the same way, but from a far better vantage point than those other shows, to a point where normal mainstream audience jump on from the begining without a second thought.
All the other shows you mentioned have helped get the mainstream audience to this point to, I agree, and one not on the list which I think has been a major bridge in the last year has been Westworld.
It’s amazing to be in this place, I remember 20 years ago watching The Matrix and feeling “We’re finally in the system. We’re finally on the way to being so much more on the screen,” but to actually be at this point where a calibre of trailer for a TV show drops like that, never mind a cyberpunk TV show… It’s pretty awesome.