I must respectfully disagree.
You do make some good and valid points. And yet, by the early to mid nineteen seventies… WHERE WERE THEY?
2001 was a good movie… but it was seldom shown on TV.
Moon Zero Two had its merits… but I didn’t know it existed until the 1980s.
Forbidden Planet was quite good… but unless it surfaced on the Late Show, you were hosed.
I could keep going, but I won’t. Good things appeared and were appreciated, and were mostly forgotten. The crap followed two of those stages, skipping the middle one. I saw and liked Rollerball, starring James Caan, for example, but it hit the theatres and was seen and appreciated… and vanished. It did not become a phenomenon. It did not cause a cult.
Because I WAS there, I remember the pop culture phenomena quite well. In the age before home video, back when you were at the mercy of the local theatre or your local TV affiliate to feed the SF monkey atop one’s back… there were a variety of games in town, sure. But most of them were *Star Trek *or Star Wars, unless you were an early adopter of Beta or Laserdisc or Selectavision, or any number of clunky expensive things that finally lost out to VHS.
Trek got showed half to death in reruns.
Planet Of The Apes got showed half to death on televisions, and I well remember all night “ape-a-thons” at certain drive-ins and theatres, YEARS after the first movie came out.
Star Wars sat at the Playhouse 3 in Victoria, Texas, for YEARS after it came out. A dollar a ticket. I must have seen it fifty times in the summer of '78, alone.
Lost In Space got showed half to death in reruns, I suspect largely because another affiliate was showing Star Trek.
Sure, there were other items. But none with the power, the pop culture impact. 2001 was made in 1968, but I notice that James Bond movies didn’t decide to include rocketships and zap guns, per se, until 1979… after Star Wars came out.
Hell, for that matter, I recall the tidal wave of insane space crap that came out in 1978, crested in 1978, receded by 1981, and arguably gave birth to ET by 1982.
Disagree if you like. Argue if you think it worthwhile. But don’t tell me I wasn’t there.