InfoTrends says people will take 1.2 trillion digital photos this year. That's 100 billion more than last year and nearly double the number taken as recently as 2013.

The rate at which photo taking grows is currently clocked at a whopping 100 billion per year - that means each year humanity takes 100 billion more photos that it did last year.

I think that rate is about to accelerate. And the reason is wearable cameras.

As the cost goes down, quality goes up and ease of use improves (through miniaturization, better software and better batteries), wearable cameras will become more compelling.

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