Cotton is head of the Human Variome Project, which is trying to catalogue a list of all genes that cause diseases, in a hope of one day being able to prevent them. His vision for bumping smartphones before bumping uglies was part of a talk at TedX last week.
At the moment, genome sequencing is a very expensive and intense process, and currently out of most people's price range.
It's an interesting idea, but there's a lot to be said about passion and love when it comes to having kids as well, not just a scientific approach to fertility. There's also the inherent security questions that come with carrying around your entire genome sequence on a device you replace on a 24 month contract every couple of years.