CRISPR indeed has the potential to revolutionise medicine, and by extension, the quality of human life. Though some challenges need to be overcome first, most notably the dangerous "off-target" effects. While CRISPR can be very precise in targeting only certain gene sequences, sometimes the CRISPR-Cas9 complex may target a similar sequence that it was not intended to, and thus cause unexpected damage.

In short, the next step is to refine CRISPR and make the system more precise, probably by using a different Cas nuclease.