While this thread is still alive I remember when Gilligan's head became a
radio and the skipper mentioned that if there were two of him they could
have stereo. This was years before Kahn am-stereo. Hmmmm

might have been a goof in the writing or might not have been. Stereo was
invented way back before the 60's. A radio station here once played stereo
records from the 1930's!!!

It just wasn't used much or wasn't popular until later.

I'm pretty sure that people knew what stereo was in the 50's. Although not on
FM radio.

So even if it wa a goof, it can still be explained away.

Today, we know what 3-D tv and holographic tv is, but how many people have
them?

It's my understanding that they can't even do holographic tv yet (unless
possibly if it's only still images instead of moving images), yet we know what
it is.

Back in the 30's and 40's, most people only had radios, but they probably knew
what tv was, and were probably waiting for it to be invented.

And yes, I'm aware that tv was being worked on even back then, and that there
were experimental tv stations broadcasting then.