Not this nonsense again. Setting aside the "immortality" confusion, the people who predict radical breakthroughs in mere "life expectancy" by such a such a date in this century don't understand what the term means. We determine life expectancy of populations retrospectively by gathering statistics on when individuals in the groups under observation die. In addition to that, humans already live longer than other mammals, so how can we learn in a time-efficient way that an alleged "life extension" therapy works to extend the maximum life span beyond 120 years, as opposed to squaring the survival curve, and with a quality of physical and cognitive health you would want to have?

We can't, obviously. Instead a feasible life extension experiment which won't make scientists and other rational people laugh at it would require institutions to conduct longitudinal studies of the experimental group, with the resources and commitments to gather data over many decades, rather like the Harvard Study of Adult Development or the Framingham Heart Study. Several generations of scientists and physicians would have to devote their careers to gathering the data, and then some time in the 22nd or 23rd Century the researchers active at that time would have enough information to draw conclusions about the experiment.

Of course, cryonics research has one huge advantage over chasing "anti-aging" mirages: We can conduct experiments in the here-and-now which can generate useful data about brain cryopreservation, or about other ways of brain preservation if you prefer those. Thomas Donaldson explains the difference in this article:

Why Cryonics Will Probably Help You More Than Antiaging

http://www.evidencebasedcryonics.org/why-cryonics-will-probably-help-you-more-than-antiaging/

Notice Donaldson's comparison of aging research with the history of astronomy. It took the efforts of generations of astronomers, over a succession of civilizations, before some astronomers active in 17th Century Europe had enough data to formulate an adequate mathematical model of planetary motion. The real breakthroughs in understanding aging which would allow for effective interventions might not take thousands of years before the equivalent of Kepler, Galileo and Newton arrive on the scene, but they will probably take longer than our current life expectancies, despite the foolish transhumanist talk about "immortality by 2045." In the meantime, cryonics offers a way of making progress on a timescale which might do us some good.