Just as ads in the 1950s assumed that all women were housewives desperate for new ways to starch their husbands' shirts, advertisers today demonstrate an extremely low opinion of their male customers.
Every so often a song explodes into the mainstream completely by accident, tearing up the charts to the surprise (and sometimes chagrin) of the musicians responsible.
If movies are to be believed, hackers are mostly kept busy kickflipping over the pentagon before sleeping in Mom's basement. But neither assumption is true.
Science fiction has had some stunningly accurate premonitions. And we're not talking about broad predictions, here. No, this stuff is impressively accurate.