We do not know the limitations of adult stem cells. The article says as much.
Why is your hope so unlimited in embryonic stem cells but so narrow in the case of adult stem cells? Why can't scientists who you hope will be able to solve the induction problems, the propensities of embryoninc stem cells to develop chromosomal and genetic defects and to form tumors in vivo, and the probability of tissue incompatibility also solve/ instead solve the problem of de-differentiation and induction in adult stem cells?
Actually, my hope is quite high for both. Adult stem cells appear to be easier to work with and yield short-term solutions. Pluripotent stem cells hold the hope for fixing what multipotent ones can't, plus they have the capacity for telling us what happens in the beginning of cell formation (adult ones can't do that, they're too far developed).