Many have thought for a long time that adult stem cells show more promise. Research on embryonic stem cells has shown that they can lead to uncontrolled, i.e., cancerous, growth. I've always thought the controversy over embryonic stem cell research would end up being pointless.
When business realizes that adult stem cells and umbilical cord stem cells can be manipulated, banked, and turned into cells needed by whole classes of genetically similar patients (with banks of cell lines matched generically to whole groups of similar genetic characteristics), THEN the cannibalistic zeal will abate and stem cell therapies will become the miracle hoped for. God will not bless cannibalizing embryo-aged humans, but He will bless honest work that defers to moral/ethical behavior.