hmmmmmmmmmm
I so badly want to say Irritable Bowel Syndrome, but i think i'm going to say cancer instead. IBS, while annoying as hell and at times very uncomfortable, isn't dangerous. Cancer kills people, slowly and painfully. Many good people have had their lives ended prematurely by it, and the current treatments we have are often harsh as fuck, and don't always work. If we could find a bona fide cure that works every time with relatively minor (or completely absent) side effects, that would be a BIG THING.
Of course, i don't know if a cure for cancer would be hidden in Pluripotent stem cells, but hey, i'm not a biologist. :v