Nanotech to help the poor?

How will NNI style nanotech or later nanotech be used to help the poor ?

“Nanotechnology has the potential to generate enormous health benefits for the more than five billion people living in the developing world,” according to Dr. Peter A. Singer, senior scientist at the McLaughlin-Rotman Centre for Global Health and Professor of Medicine at University of Toronto. “Nanotechnology might provide less-industrialized countries with powerful new tools for diagnosing and treating disease, and might increase the availability of clean water.”