"Two years from now, spam will be solved." - Bill Gates (2004)

 I mean, come on. This one was just wishful thinking. At the 2004 World Economic Forum, Bill Gates made the bold claim that spam email would be gone in two years.

Bad news, Bill. It didn't happen. A report published in 2014 -- 10 years after Gates' prediction -- showed that, on average, 54 billion spam emails are sent everyday.

5) "Everyone’s always asking me when Apple will come out with a cell phone. My answer is, 'Probably never.'" - David Pogue (2006)

Image Credit: The New York Times

In 2006, the above quote from tech journalist David Pogue appeared in The New York Times. In 2007, Apple released the first generation of its iPhone. Sooo yeah, a definite swing and a miss.

But even after the iPhone was released, tech soothsayers still weren't sure it'd be a success ...