How quickly technologies spread over the past century

Everyone knows that the adoption rate of emerging technologies is accelerating more and more.  But just how fast it has accelerated is surprising. Just look at the number of Candy Crush Users: It took the telephone 75 years to reach 100 million users. It only took Candy Crush Saga 15 months to each 100 million users.

What will the next emerging technology be to gain 100 million users in under 12 months?