This is exciting news for so many reasons but also very concerning; the DNA code for a human being is an exquisite and mysterious thing to its owner, but it's also not a play toy. Here's a bit of background about CRISPR: http://www.yourgenome.org/facts/what-is-crispr-cas9
I love the concept, but am afraid that a genetic patch would be more like a software patch that while it fixes one issue, it creates three more that are worse.
I am waiting for the Star Trek Transporter that can filter out disease and such with each transport.