1) They're the LPs, they're not leading the initiative.
2) They're explicitly working with cultural leaders. Maybe you could count someone like Neil deGrasse Tyson, but the list is pretty short. We haven't really had scientists as legitimate cultural leaders since the days of Timothy Leary.
No you can't because NDT doesn't represent business opportunity and consumer behav-- er, I mean "in other words, culture".
E.g. NDT is pretty similar to Bill Nye, but neither are on the level of Carl Sagan, Stephen Hawking, Richard Dawkins, Richard Feynman, etc. And both are largely derivative of Mr. Wizard and others who had done similar programs before.
Nas on the other hand created one of the most groundbreaking albums of all time. And it provided a completely different look at NYC as compared with Sex and the City, which was released only four year later.