In the article - he makes an assumption, but doesn't back it up with specific scientific theories that can be applied, tested, and researched.
So just because he thinks there is a possibility that type of technology will be available is nothing more than a personal opinion based on totally non-relative facts like the worlds advancement with computers.
Fact is, most religions believe you can "spiritually" over take your body. Science believes you can re-engineer.
Science deals with after facts. I mean we have a sun, so we use mass and motion to define other things like time. The sun circulates 365 days around the earth. The sun is a fixed parameter when defining years, months, hours, days, the weather, harvest, etc.
But science doesn't have an answer for where the sun came from, or why it is perfectly positioned around the earth and other stars. Nothing up there is random. In fact, if the sun was to close to this earth, we'd all burn to hell, and if it was to far, we'd freeze.
The fact that we our born into bodies that have every organ on the exception of teeth (so that we don't bite our mothers nipples off) is even more profound proof of an overall creator. But then Im not here to suggest religion, rather just to say that science is nothing other than the study of elements that we can measure.
Things before this worlds existence like perhaps the Sun, moon and stars and of course our gene code is great to study - but I doubt it can be conquered. Unless God himself shows up - on this earth it would lead to Hitlers with "supreme society".
You have countries, governments and kings who require "power" and "your taxes" to ensure that this world never unites under a solid one race - let alone conquer immortality. But seriously, imagine you - the simple person - being immortal to the king, government, or country your from. Immortal suggests you the laws of this world relative to death don't apply, so obviously there is no "fear" factor.
Trust me, that isn't going to happen soon - at least not for the peasants of this world. Btw - loved Justin Timberlakes movie on the subject. Didn't get at first how he was dancing with "mom" who looked his own age - but if you can get passed that, it's a great flick.