Multiple problems with this.

Reiterating what Puck already said, such a long life expectancy would pretty much destroy all of our resources.

I highly doubt this would happen in the next twenty years. I haven't been on this planet for very long, but I've quickly learned that there are always a group of scientists who take one discovery and say that they can apply it in about 100x the scale and complexity without breaking a sweat. This is one of those cases.

On the plus side, if it did miraculously work, it would probably be so costly and complex that it would be limited to a select few, thus not theoretically dropping our overpopulation problem from a bowl of lukewarm soup into the depths of hell.

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"True wisdom comes to each of us when we realize how little we understand about life, ourselves, and the world around us." ~Socrates