How music evolves
economist.com
economist.com
But seriously, using the "Billboard Hot 100" is pretty unscientific, that list says more about mass media than it does about musical styles. For example in the early 90s there was a lot of independent radio stations fueling that boom that were gobbled up a few years later. MTV was also huge and was getting pretty weird with 120 Minutes and Yo MTV Raps. The music being produced hadn't necessarily changed but more people were suddenly hearing it.
And now because of how schizophrenic everything is, the Hot 100 is a list of names most people have heard of but nobody actually listens to: http://www.billboard.com/charts/hot-100 Okay maybe not NOBODY, but since radio airplay is a key consideration that list has all kinds of problems.
Technological revolutions that have lowered the costs of recording and distribution have often precipitated changes in the music itself. Not to mention the new capabilities introduced by new technologies like electric guitars, magnetic tape recording, sampling, digital recording, and whatever that robot-death-sounding thing that they keep doing in Dubstep is :)
"Harmonic topics, of which there were eight, captured classes of chord change, or their absence (eg, “dominant 7th-chord changes” and “major chords without changes”). Timbral topics, of which there were also eight, were things like “drums, aggressive, percussive” and “female voice, melodic, vocal”."
I also immediately mentally leaped to "electronic" music, but it doesn't seem to me that they were looking for that sort of thing.
I'm not saying it's all technology but when something is cheap and new that's an attractive combination for musicians looking for a different sound. And that new thing will have new strengths and deficiencies which will determine what types of music sound good on it.
ps: for a reason, printfriendly manage to extract the content http://www.printfriendly.com/print/?source=site&url=http%3A%...
Funny because a quick inspection of the DOM got me nowhere near that content.
Also, link to the original paper : http://rsos.royalsocietypublishing.org/content/2/5/150081