[gobuchol]

Anti-ageing therapy i.e. lifespan extension (also related to medical science as a longer lifespan also requires dealing with other health issues like cancer). The technology for the first iteration of this is probably quite close, within a few decades or by the end of the century at the latest.

It's a thorny issue though. People are afraid of death but paradoxically this sometimes manifests in resistance to any efforts to address it. I think people have difficulty dealing with the idea of life extension in an equanimous manner, as the concept of death is loaded with fear.

So there will be arguments against it from many perspectives: psychological, philosophical, economic, religious and so on. These arguments can have merit and warrant due consideration but I think that fear and pessimism should be balanced with hope and optimism.