The technology might need a decade or two to get all potential pitfalls fixed but it could be utilized right now. It wouldn`t wonder me if some black clinics are modifying people right now. The thing with CRISPR is that you don`t cause side effects (
science.sciencemag.org/content/early/2017/10/24/science.aaq0180), you need of course understand the workings of the gene allells but once we have advanced enough to be to edit 10k loci reliably we would be able to safly make genetic changes with effects that would be big enough to make a distinction between gene modified and baselines appearable.
There will be massive social consequences, if everyone is a born genius, has a olympic physique and don`t have to worry about getting ill until hitting 100 years, that will make changes necessary but not necessarily negative ones. I`m less afraid of its implementation in democratic societies and more worried about the potential abuses that will occur in dictatorships. Super-soldiers would be the least of our worriest.
Most parents will love their children, independetly if they are genetically modified or not. It is more likely though that genetically engineered humans will perform better in general and those genetically engineered who do not, will be seen as weird or lazy, wasting their potential. But that is the right of any person and people will be people, even those bred in a artifical womb. Most gene moddified will just see themselves as vaccinated 2.0, just that medical technology also allowed them to have a greater variety of gifts and talents they can use however they want.
A greater problem will be heli-parents that force their child to be what they wish it to be or treat it as a superhuman instead of raising it as its own person. Such forceful treatment will lead to the creation of a perfection or superior complex in some genetically engineered people.
The greatest dangers will be religious fanatics or radical enviromentalists that will not see such people as people.
