It’s cool stuff, although I’m a little doubtful about it working well for general web content. It would be a fun experiment, though!
Would that be interesting in browsers? I suppose some people would find in interesting in some cases (*cough*porn*cough*), but it’s a little scary and creepy to think about the kinds of social and psychological effects that would arise from subtly applying such an algorithm everywhere. (Consider a similar vein: automatically rewriting web pages more cheerful. A news article about panic selling on Wall Street suddenly becomes a doubleplus good story about the great weather, buying opportunities, and fluffy kittens!)