I think that depends on pressures and variation as well; without selection pressure I don't think that there is a reason why the variation in the overall population will change.
There are still selection pressures, only they are more focused on sexual selection rather than survival selection.
There still remain advantages to being smart healthy and athletic. What has changed is the lower bound on these required for survival. What has happened to pressures on these required for reproduction seems like a much harder to judge question.
Certainly though, those with advantageous mutations seem to have a better chance of reproduction.
Selection pressure doesn't just mean people being killed by things. Some groups having significantly more surviving offspring is also a selective pressure.
Certainly though, those with advantageous mutations seem to have a better chance of reproduction.