Actually, stem cell research has already provided successful medical treatments and cures.
Stem cells are pleuripotential. This means that they can turn into various specialized cell types. They are a "wild-card" cell that can be programmed into any number of cells that perform needed or deficient functions.
A recent development has been the ability to harvest stem cells from liposuctioned fat. This avoids all of the controversy surrounding the use of embryonic stem cells.
Stem cells are currently used successfully to treat leukemia. Stem cells have also been used to repopulate a patient's bone marrow when the marrow has been destroyed by disease.
Soon, stem cells will be used to replace deficient islet cells in the pancreas as a permanent cure for Diabetes.
On the horizon is the use of stem cells to replace missing neurons in spinal cord injuries.
Stem cells will be used much like grafts, replacing various tissue types that have been lost by injury or disease.
Stem cell research has accomplished a great deal in the few years it has been undertaken. We should sll support this research because it has a very real potential of curing many major diseases.