actually more people may have HEARD OF Joy Division and New Order now, percentage wise, but mainstream more popular? not really.
2004 music scene is really different from 20 years ago thou, so much more fragmented now ... so many different interests... so much mixture of styles from different eras now... so much easy access to all types of music from being able to download or buy almost virtually anything on the internet, so much info on bands on the internet anybody can learn about Joy Division, more types of dance and indie clubs in all larger cities now
back about 1982 you had to go to an indie college vinyl record store and hear about Joy Division/ New Order by word of mouth... buy the records (which had little or confusing info printed on it) just to hear the stuff for yourself. a couple indie band clubs maybe one night a week, no cool dance clubs except for gay i guess... the scene is so much more open and mixed now
as for the radio... 20 years ago there were three types of stations for younger set.... the pop top 40, lifeless (AOR) "album oriented rock" (they play almost exactly the same sh*t now, literally, it makes me laugh... its so stagnant), and "black music" for black people. Prince was the only crossover star. "Disco" was stupid or "gay".
so much variety for teenagers now... its cool:D