Girls born since 2000 in the developed world are more likely than not to reach the age of 100, with boys likely to enjoy lifespans almost as long. The article "The Biodemography of Human Ageing"[1] by James Vaupel, originally published in the journal Nature in 2010, is a good current reference on the subject. Vaupel is one of the leading scholars on the demography of aging and how to adjust for time trends in life expectancy. An article in a series on Slate, "Why Are You Not Dead Yet? Life expectancy doubled in past 150 years. Here’s why,"[2] gives background on the incremental changes that have increased life expectancy. ("Period life expectancy" is what is usually reported for a whole country. But cohort life expectancy provides a better estimate of future lifespans of young people today,[3] and is still steadily on the rise around the world.) Life expectancy at age 40, at age 60, and at even higher ages is still rising throughout the developed countries of the world.[4] It's great to hear that India is enjoying this kind of development too.
[0] http://www.prb.org/Journalists/Webcasts/2010/humanlongevity....
[1] http://www.demographic-challenge.com/files/downloads/2eb51e2...
[2] http://www.slate.com/articles/health_and_science/science_of_...
[3] http://www.time.com/time/specials/packages/article/0,28804,1...
[4] http://www.scientificamerican.com/article.cfm?id=longevity-w...