Some thoughts from someone who was there, on the fringe of it:
Detroit: is a land of wondrous musical invention, just new trends but whole new paradigms over and over, and it's never credited: Motown, of course; Punk (Iggy Pop & the Stooges, MC5 - name earlier punk!); Funkadelic (George Clinton et al); and Techno. At their heart they are creative, artistic, non-commercial (Motown being a big exception to the latter). Try to name other communities that match it, and give Detroit some due.
Techno: I've heard it described (by someone who would know) as the music of black middle class kids in Detroit. Think of what that means: Think of the historical implications, for the next generation after the civil rights era. Think of how rare that image is - today - in our public sphere, 'black middle class kids'. And from this perspective, to great disappointment, the black musical genre that America embraced was hip-hop, which sold itself as the stereotype many whites have of African-Americans: Poverty, violence, crime, lack of education, acting out, etc. That's what people associate with black kids - and that's what they bought - not futuristic techno; everyone in the world knows hip-hop is 'black' music; few outside techno know its origins. It makes me angry to this day. Here's a bit of that history, from the 313 (Detroit area code) techno mailing list:
http://music.hyperreal.org/lists/313/08.html
Through the 1990s, Juan Atkins, Derrick May, Kevin Saunderson and the other techno pioneers, legends and stars elsewhere, were unknown in Detroit beyond the small techno community. Every summer in Hart Plaza downtown, Detroit hosts various weekend festivals, such as a large country music festival. In 2000 a new one was added to the schedule, the Detroit Electronic Music Festival. I can't express the shock, the bewilderment, of local Detroiters when a million people from around the world showed up - to Detroit? For electronic music? Why??? The visitors knew more than the locals. And I was there - my favorite musical memory - for the moment Derrick May, long ignored in his hometown, at last took to the turntables before a massive crowd in Detroit:
https://www.youtube.com/watch?v=R4xqV9_7rf0