Vortex, the idea is simple. A person donates a cell which is linked to an egg, producing cloned stem cells that are of same DNA as his own. No rejection problems! Say new cartilidge is grown and inserted in a worn out knee - no rejection - no imuuno suppressive drugs required. resores the natural joint rather that replacing with a metal one which wears rather quickly. The possibilities are endless and offer possible cures for oh so many of man's ills!
Unfortunately, this unfolding medical gold mine will not be a US accomplishment unless we can get the knee jerk religionists and anti abortion crowd off medicine's back! While I have no desire to see humans cloned - there are too many already - the cellular technology is very promising.
Interestingly, I think of myself as religious and have no problem with the technology. I sincerely believe we were given the knowledge to use.