This is a weird press release. There’s no mention of stem cells in the title. It doesn’t say what kind of stem cells. Maybe they didn’t want to name them.
i read the article. From what i was able to tell, embryonic stem cells are NOT the concern of the research, rather, it is the patient's own stem cells. It deals with differentiating the patient's healthy stem cells from the cancerous stem cells, and eradicates the latter.
No ethical concerns here.