Better genetic analysis will make it easier to discuss politically incorrect topics because rather than talking about IQ you could discuss complex gene clusters characterized by hard to understand mathematical correlations. And I strongly suspect that with a better understanding of genetics race would become much less significant in statistical analysis because after you account for genetics you would gain little statistical significance by directly adding race into a regression (i.e. if gene X does something important and 80% of Asians but only 5% of whites have the gene then without genetic analysis race is important but after you know who has the gene race isn't statistically significant.)