After the Microsoft years he has proven to be a brilliant individual with a genuine interest I. Using his fame and fortune (and everything that goes with it) to try to improve the world.
How many college-educated liberal folks with a non-engineering background do you know? It's all but impossible to avoid him in these circles.
(I say this as a philosophy degree-holding liberal pinko who is is exasperated by Gladwell. To be fair, I'm more exasperated with the culture of cherry-picking near-banalities wrapped in an engaging narrative that he and the TED folks have propagated rather than their work itself.)