What is the future of stem cell research? Embryonic cells were once so controversial that President George W. Bush limited federal funding in 2001 (a policy that was overturned by President Obama in 2009). Now there is a new type of stem cell, similar to embryonic stem cells, called induced pluripotent stem cells. We’ve all heard the claims concerning the extraordinary potential of stem cells (be they embryonic or induced) in the treatment of human disease. What will be the first commonly used stem cell therapy?