Template:It Will Never Catch On
"Groups are out. Four-piece groups with guitars particularly are finished."—Dick Rowe, Decca Recording Company executive, 1962 (turning down The Beatles)
Anachronisms are funny. As are "prophecies" uttered by people who are in a position to lose a great deal of influence, money or credibility if they are wrong.
The best thing about Alternate Universes is that they have things we can't possibly imagine being true. Why can't the reverse also fit?
Oftentimes, be it a medieval setting or anything else where things we know about have no business existing, something abundantly familiar to our modern audience is put forth as a hypothetical. The punchline is that no one thinks it could possibly be popular, allowing us to laugh at how wrong people's predictions of the future really are, and pat ourselves on the back for being so clear-eyed.