Monty Python, The Hitchhiker's Guide to the Galaxy and Star Trek are becoming old. These are references from the 70s. I'd say anime took over as the stereotypical geek culture thing. Japanese otaku and western geeks got along.
Also fantasy became popular over science fiction, the video game landscape has changed dramatically, and of course, younger geeks grew up with the internet more than with TV. Also, there are series like Stranger Things that are definitely geeky.
Things are moving on, we are just getting old.