Welcome to Future World, where the average income is $100,000 a year and people need only a 20-hour work week to earn it. Since the present day, medical science has progressed even faster than income. There are bionic limbs; gene-specific therapies to cure cancer, heart disease and other ailments; cell regeneration; antiaging drugs; and all manner of other improvements that could — if fully used — extend life spans to 125 years.