GenZ and Millennials prefer to buy music online while Baby Boomers still prefer owning a CD or DVD. As those are the three biggest consumers of pop music, we can assume that this translates to pop music as well.
According to the WSJ, "people don’t focus on genres anymore but on the artists and songs." This is even more true when considering that people listen to as much as 4 genres on a regular basis.
We could even see this effect in the music production as well, as a lot of pop songs have adopted hip-hop elements while hip-hop artists have started transitioning to more pop-style songs.