Yes, everything is formulaic because it has been boiled down "scientifically". Studies after studies have been done to honed and learn how to maximize profit and make pop music evermore popular. Clothes have changed quite a bit. It went from baggy pants to tight metrosexual, to americana/monochrone, to 80's retro. In term of style what you see has not changing much are the result of the implosion of the cultural homogeneity. You don't have a cultural block anymore so instead of one massive cultural shift moving everyone, you have hundred of subcultures moving in their own directions, only vaguely being nudge by the cultural mainstream.