I always love to hear Anne speak. Alas, I live-blogged her entire hour-long keynote today, complete with examples, and due to a horrible WordPress browser fail (including no success with autosave reversions) I lost all the text and examples!
So to recreate it from memory, Anne discussed some of the musical characteristics of black popular musics, as articulated by Wilson (1983), and then used these to trace a 50-year timeline of rhythmic accuracy in African-American popular music, particularly focusing on the cusp of digital tools (from early 1980s). Trends were traced, from the quest for super-accurate grooves (e.g. Prince’s Kiss), through the muddying/blurring of the beat (examples include Snoop Dogg, D’Angelo, Destiny’s Child, Tyler The Creator).
For more on this fascinating field, take a look at Anne’s researchgate profile and RITMO/UiO profile, and her various books and publications on micro-rhythm in popular music.