The change may be already happening, as humans continue to evolve. What traits - end products of our individual developmental histories - are most important to succeed in the modern age?
Commercially available genetic tests related to exercise and sport are widely criticized for ethical and scientific reasons, but height and the length of limbs are already used for pre-screening of children to determine which sport they might excel in. More genetic and physiological measurements will be utilized in the future. One recent discovery is the asymmetrical egg shape of the right hip joints for golfers, although it remains to be established whether professional golfers have this trait because of extensive training or whether players with such hip shapes are more likely to become professional.
Like beauty and brains, bodies are shaped by both nature and nurture and might require early training and specialization. Will the future society be divided into factions with pre-determined fates? In an ever more competitive world starting to resemble Olympic games, will our genes and childhood bodies decide - once and for all - what we do for the rest of our lives?