We would quickly run out of the resources required to sustain the population: potable water, food, space to live, as births would continue but death from old age would have ceased. read more
However, today, with aging 'switched on' and conflict, famine, death by accident, disease etc.all fully in effect, the world population is increasing - again exponentially - by a positive number between 1.092% and 1.3%, depending who you listen to. read more
India, Indonesia and Nigeria would have a quick jump in population, but then the growth rate would return to the same as before. The long term impacts of the population depend on birth rates, not life expectancy. Interestingly, though, eliminating all disease could have an unexpected impact on birth rates. read more