If you woke up 20 years from now in 2042, what would be different? Here are some ideas     1    (base) on numbers that don’t require crystal ball. About 70% of the world population is expected to live in urban areas by 2050. That means most cities are going to need more infrastructure. Roads, public transportation and waste management     2    (upgrade). And we’ll be older. We are likely to live until 82.4 years old, compared with the current life expectancy of 79.1 years. That’s a good thing     3     health care companies. But living three extra years is going to be more expensive,     4     will have implications for both working and saving.