Kwang Soo Kim's skin stem cell replacement therapy

Why have i not heard of Kwang Soo Kim’s skin stem cell replacement therapy by now? Is there something I’m missing?

According to MJFox website he is legit, and according to here it says they are able to do stem cell replacement therapies with ones own skin cells. A Korean Scientist Discovers Breakthrough Treatment for Parkinson’s Disease - Businesskorea

Is there some downside im not seeing? Other than probably the price… which of course is huge but at least hope.