It's the local music scene where the innovation still exists.
I'm sure that's a pretty sound observation.
From my own background, primarily in Engineering, but also with a good dusting of the sciences, another factor for innovation is cross-pollination of ideas. Ideas that come into one field, initially completely out of kilter with another field, and then a crazy idea becomes an exciting idea.
I've just realised that two of those groups are from the same city (Bristol, UK).