Full name for stem cells
Human Embyronic Stem Cells (hESC) can be programmed to differentiate into a number of different types of tissue depending on the signals you give or withhold. 



Source: BioTime

The company Viacyte is actually developing a technology based on hESC that can be used to rescue loss of function in type-1 diabetes, just as an example. Their process takes hESC to pancreatic endoderm after about a month. The pancreatic endoderm has the capacity to differentiate into beta cells, ductal cells and so forth. He could have also been talking about human induced pluripotent stem cells (hiPSC). Like embryonic stem cells, these can differentiate into "anything," but are derived differently.