This is pretty amazing, I didn't realize we had this capability yet.  Beyond curing genetic diseases, it will only be a matter of time before people start wondering what kind of advantageous changes can be made to living organism.

Ya most people aren't aware of how close to science fiction we are getting. So much ridiculous stuff is being worked on in labs right now that will hit mainstream in a decade. Real thought controlled prosthetic arms and eyes are my favorite, although all the recent advances in robotics including the google robotic competition comes close. SpaceX and their reusable rocket also deserves a mention, soon we might start mining asteroids.

The idea of genetic engineering is not new.  Sci fi novels have explored many. many aspects and possible uses and abuses of this kind of technology.  The exciting thing is that, once again, if we can imagine it, we eventually find a way to actually do it in real life.  And like every tool, it may, and can, be used for good or ill.  In all likelihood, considering our species history and track record, it will be used to do many good things -  also, some bad, perhaps even evil things. Such is our species. This amazing  new technology will breed even more techs.  What we are seeing is, for the first time, ours species ability to actually design and direct its evolution at a genetic level.  Not through cultural adaptations, or selective breeding - but to actually rewrite an embryo's genetic data, and thereby design the baby.  Will this be used to create a caste system where everyone is 'happy' with their lot?  Will we nudge all babies into being genius level prodigies? Will the inherited uber wealthy family dynasties use it to enhance the advantages they already have?  What is certain, in the short run, is that medical professionals will use it to fix aliments caused by  faulty genes.  And that is worth the other risks, IMHO. 

It is interesting that it could (like so many things) be used in a number of different ways.

There are lethal traits which could be eliminated, allowing childless couples to have a future as well...

What is however clear, is that it will happen. It would be well to remember that Sickle Cell trait occurred and became prevalent because of Malaria. As the MAlaria vaccine's use becomes more prevalent, the 'need' for the trait will become lower so that it 'could' be dispensed with (since as a homozygous it is lethal). However, biologic systems evolve, so that MAlaria might become unnoticed by the antibodies. Then, where will humanity be? Vulnerable to the parasite since the sickle cell trait will have become eliminated.

Similarly, it could be said that under current conditions, certain traits are undesirable and cause suffering. Therefore they should be eliminated. However, if conditions change, those once 'undesirable' traits might become key for survival...or, might mutate into some very desirable trait when interacting with other genes.

Interesting... 

Yes, one of the fundamental mechanisms of life on our planet is that each generation throws some variability into the mix. What's a "disease" in one setting may be the savior of the species in another.

Every generation throws a set of darts at a dartboard. Most of the darts land safely somewhere on the board, but some unfortunate darts end up as outliers. However, the dartboard is always moving, usually slowly but sometimes quickly. Occasionally what would have been an outlier before, ends up connecting with the new position of the board, while many of the other darts end up on the bar room floor.

Ignore the movement of the dartboard at your own peril.

Welcome to the future.

Now wait till someone pays a Chinese doctor to turn them into a human-animal chimera.

There's a classic sci-fi movie dating back to the late fifties early sixties that deals with something very similar to blade runner. The only difference being the clones weren't hunted down. In fact the clones didn't know they were clones. Forget the name of it though. 

It was a movie. I do remember one scene in which a man and a woman are standing in front of...something...a window I think...and with them was a scientist who showed the man that he was a clone by plunging a knife into his heart. He didn't bleed or even flinch.

My bad...I meant android.