It's hard to find good data on this. There are multiple dimensions to the problem, I'd like to focus on three: flops, non-volatile memory and RAM.<p>In case of my phone, Nexus 5, the triplet is (5 GFlops (estimated), 32GB, 2GB).<p>My initial research shows the point is somewhere in 60s, meaning there are people in the prime of life who were born then. I think the most interesting would be to see if this range shrinks or extends in time.