But this is clearly nonsense and a falsehood.
While there are currently more adult stem cell treatments out there, this is primarily because such treatments take a long time to reach human stage trials and adult stem cell research has been a viable area of study for a considerably longer period. Embryonic Stem Cell research was also really compromised by Bush pulling federal funding the way it did, because companies like to avoid doing the early studies which tend to be done with government support and tend to focus on treatments potentially closer to FDA approval and being sold. (Under the Bush rules, if a research agency accidentally used a single glass beaker bought with federal funding for general embryonic stem cell research, they risked losing all federal funding in the future.)
While adult stem cells have been used for a variety of areas, there are others where embryonic stem cell research appears more promising. In particular, with regards to the treatment of paralysis, Geron has received FDA approval to begin initial human trials.
http://www.mercurynews.com/business/ci_15641176?nclick_check=1
While there are attempts to have adult stem cells manipulated to perfectly copy embryonic ones, its not yet clear if these will be fully successful in doing so entirely. In particular some of the current trials have run into additional cancer risks which is an obvious problem for any treatment for humans.
At best you can say we
might not have any scientific need to continue pursuing embryonic stem cell research in the future, but you can't honestly say we know that right now. (The nature of research of this sort is you don't always know which approaches are going to be successful with regards to research in advance and actually have to conduct experiments to find out.)