This is an illustration of cultural diffusion; of how cultural currents are spread from a source, a root. I can tell you, when this song came out, it was one of the freshest and most startlingly original records I had ever heard. And the same for Chicago house in general: it was so new, so out-of-the-ordinary as to seem like it just appeared out of nowhere, fully formed. For listeners like me, who were still stuck in a post punk / new wave / Industrial kinda mode, the vitality and originality of Chicago house quickly swept away all other interests completely. It was a paradigm shift. I don't think that any of the many derivatives of house, including drum & bass and dubstep, and 'garage' (which is really just house), have or had anywhere near the originality, or vitality, of the pure true original Chicago (and Detroit) house music, and that each of those sub-genres is as an echo of that original impulse, radiating in diminishing waves from that very special time and place.
The video is quite interesting in itself, as it features real Chicago locations and a little school footwork.