Answer

"What will we be able to do by cloning technology in future, and does it really possible to carry it out?"
I refer to this question. If cloning technology is used fleely for cloning humans, the super humans; Einstein, Usain Bolt, Newton, etc.. would comeback to life from dead. But it may be probably not able to  revive concerning Einstein and Newton because there is no cells of them. And we can treat heart attacks by cloning healthy heart cells and injecting them into the damaged heart area. It's possible to carry it out in future and I wish the technology will be improved before long.