Generating the cells is one thing, but putting the cells in the body and making them function is another. There is a huge leap here. By the way, they are not treating retinoblastoma, which is completely different and much more difficult. People have been culturing pigment epithelial cells for a long time, but there is a long, long way to go before they can be used for therapy. He was misleading when he says that he could put the cells into the boy and restore his vision; a clinical trial has not been done yet. And nowadays, you don't need embryo cloning to get those cells because of the groundbreaking discovery by Shinya Yamanaka's group in Japan. All said, I should say that this guy is a legitimate scientist and his research is credible, but there are a lot of exaggerations/inaccuracies in the story.