The fact is that integration never really happened in the US. The powers that be used arguments like "parental choice" to stymie progress, and we ended up in a good-enough middle ground where the privileged class could pretend something was done, and racism was over. Meanwhile school funding remains directly tied to standardized test scores, creating virtuous/vicious cycles of classism in virtually every city across the country.
The point of establishing public schools was to break the cycle of only the rich being able to afford a good education. IMO the fact that there is such a thing as good/bad public schools means the system has failed. I'm totally in favor of bussing as much as I am the use of online tools like KhanAcademy and subsidized child care.