I imagine that if they can make this sort of predictions with 70% accuracy, in the future there may be judgments on whether to allow an embryo to live depending on the acceptability by a society of those who would grow up with such a likelihood of homosexual tendencies.
Homosexuality is illegal in some parts of the world, even today, and practicing homosexuals are persecuted to the point of imprisonment, and even capital punishment.
I find it quite frightening that a government could read your DNA and make judgments on you of this sort.
Also if they could predict a person's sexual preference for pedophilia, can you imagine the chaotic discussions that would arise from such a development?
What if they then try to "fix" someone's DNA to adapt it to an acceptable community sandard in a certain society? (Like under Muslim rule!)
Wow! Science Fiction is becoming a reality and the future looks quite frightening in this regard.