Induced Pluripotent Stem Cell Research has been going on for years - in mice since 2006 and in humans since 2007. This research has already lead to medical advances in disease modeling and drug development, and will hopefully someday lead to transplant options. Since it is different from embryonic stem cell research, the two are really not comparable and one is not more important or better than the other.
I do not think that Induced Pluripotent Stem Cell Research (iPSC) technology is more useful than existing Embryonic Stem Cell technology. I think they are both equally useful. One of the arguments for the usefulness of iPSC technology is that it uses a person's own cells instead of cells from an embryo. For those who have religious objections to stem cell research, perhaps this would be more useful to them. In general though, both technologies are useful and have helped scientists and doctors learn a lot and continue to create treatments for patients.