I suspect the ideal of good journalism will shift from being what
Gladwell calls puzzle solving to mystery solving. In the former you must find a critical piece of the puzzle – one that is hidden to you – in order to explain an event. This is the Woodward and Bernstein model of journalism – the current ideal. But in a transparent landscape where huge amounts of information about most organizations is being generated and shared the critical role of the journalist will be that of mystery solving – figuring out how to analyze, synthesize and discover the mystery within the vast quantity of information. As Gladwell recounts this was ironically the very type of journalism that brought down Enron (an organization that was open, albeit deeply flawed).
All of the pieces of that lead to the story that "exposed" Enron were freely, voluntarily and happily given to reports by Enron. It's just a pity it didn't happen much, much sooner.