Forget being retired for 20 or 25 years: How about something closer to 50 years?

Science fiction? Not necessarily. In fact, it could happen within our lifetimes, maintains Alex Zhavoronkov, the author of The Ageless Generation: How Advances in Biomedicine Will Transform the Global Economy.

There are several specific technology trends that will undoubtedly make us live significantly longer than our parents and grandparents, he claims. In fact, it's already happening.

Today, the average 65-year-old has an average life expectancy of 19 more years — approximately age 84. But half of all individuals live longer than the average life expectancy. In fact, one out of every four 65-year-olds will live past age 90, and one out of ten will live past age 95.

But that longevity comes at a price, the two primary concerns being declining health and the ability to create a sustainable retirement income that may need to last decades more than expected.