I guess it depends on what we mean by "Fittest".
Do we mean physically capable or possessing attributes that advantageous in our environment?
Because in most cases we to adapt our environment to suit our needs we don’t need physical strength very often but we still need the skills, intelligence and other attributes to be successful in our society. Those that possess those skills will be at an advantage.
(If you talk to my wife you'll probally find that being able to spend thirty hours a day playing flight sims and conversing on forums is not high on that list!
)