I envision an ecosystem of machines in which sex is the driving force for evolution, but first we need to define sex for AI. I hope that following this path of evolution human creatures can be seen as sexy by machines and that finally we can produce a new breed.
Edit: Genetic algorithms are not valid in this context since we want an autonomous evolving population, some key ingredient is missing. If someone suggest using genetic algorithm as an initial approach then objective function should evolve with the population in a recursive way, mimicking strategies and resources available in each generation and trying to detect new structures as valuable approach to explore.