Because we all carry smartphones and because we all fancy ourselves as photographers and because we're all just satisfied with good enough, the pictures we take hardly ever reach the full potential of a shot. Even worse, they're run through filters that destroy the tone; they're squared off to limit the scope, and they're used with a flash that should never be used.
To emphasise our slow deterioration of camera snappin', writer Dave Nuttycombe re-did some of the world's most famous photos as if they were taken with an iPhone. And blasted them with filters. And squared them to fit Instagram's parameters.