Predicting the future is ridiculous beyond a certain point, and the article in question has absolutely passed that point.
You just can't predict what kind of revolutionary leaps science will take. There really hasn't been much revolutionary going on in a long time. Sure, we have plenty evolutionary changes to technology, but if you transported someone from 1955 to 2005, I can't imagine what would shock them about our society in the past 50 years. They might think cell phones were awfully clever. They might be impressed that we landed on the moon 35 years ago, or maybe be relieved that society isn't full of post-apocalyptic mutants after a massive nuclear World War III, but not all that much has really changed in 50 years. And now this moron is claiming that in less than 50 years we will have achievd immortality? That's a lot of faith in technology. I don't trust computers to balance my checkbook without checking it three times, and technology sure as hell isn't advancing world peace or teaching politicians what's best for the economy. Having a lot of faith in technology is dumb.
Did you ever read 2001? Asimov predicted satellites, but science pretty much stagnated before Dave reached Europa.
How sad is it that for the past 100 years our civilization hasn't been able to come up with anything better than the internal combustion engine that's actually practical? And we're going to achieve immortality? Talking yogurt, maybe -- I can see people investing resources in that kind of crap.