Which advertising slogan, created in 1970, helped transform public perception of a major scientific discovery from the 1960s that was initially seen as merely 'interesting' but not practical?

In the world of inventions and discoveries, advertising breakthroughs have played a crucial role in product success. Throughout history, certain advertising slogans have become so iconic that they transcended their original campaigns and became part of our cultural lexicon. This trivia question focuses on a groundbreaking slogan that revolutionized an entire industry and helped establish one of the most significant technological discoveries of the 20th century.

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"A Diamond is Forever" (De Beers)
"The Microprocessor: You can't see it, but it changes everything" (Intel)
"It Keeps Going and Going" (Energizer)
"Think Small" (Volkswagen)