I don't think we'll ever get to the point where juries are selected by quotas. Judges used to practice law, they know that picking a jury is an art, at best, and mysticism, at worst. But knocking all minorities off a jury is something that draws scrutiny.
As well it should. But if it comes to the point where a judge won't allow a qualified juror to be seated in favor of someone of color who is not, that should be reversible error as well.