Honestly?

I have two things to say.

First, we stopped natural selection by protecting the weak. I truly believe that bioengineering (either like this, with genetic modification, or via external improvements like prosthetics) is the next path in the evolution of our species. We boosted our numbers by saving those who would not survive otherwise. Now all we have to do is eliminate their handicaps, then improve even an able body so that we may survive the harshness of space (because, in my opinion, I believe we will never leave the Solar System with our current bodies). Our species is stagnating. We can fix that. No more cancer. No more Downs syndrome, or Parkinsons, or degenerative neuromuscular issues.

Second thing, genetic engineering does not only apply to us. Within a generation, with this technology, I am fairly certain that some tasks (small-scale power generation comes to mind) will find themselves integrated with bio-machines - specially made lifeforms that can do what the machine can do, most likely better.

And I know there'll be at least someone who will point out that this paves the way to eugenics and other nasty side effects. My opinion on this is that if humans never developed any technology that could enable evil, we would still be animals. Any form of communication has the potential to enable evil. Cars, nuclear power, electricity, steel, all of these can enable evil. Medicine itself was often progressed by evil. There IS no doubt that this technology will be used for evil by some people. But the possible positives vastly outweigh most evils for me.