Well, I suppose if you think of how our current culture works -- and under the assumption that it will continue to be that way for thousands of years -- you have a few possibilities.
1) People we be naturally more attracted to other people who resemble those we see in the media, making selection for those individuals more desireable and more likely to procreate. Will that make future generations more beautiful? Who knows -- if beauty is largley based on symmtery, then they'd have a greater likelyhood of producing symmetrical babies (sounds weird). =P
2) Or, I remember reading somewhere that people in the (beautiful) media, and people similar to those who match those same physical requirements, are less likely to want to have children because they would want to preserve their ability to work and maintain their physical state as long a spossible. Thus, ugly people become more abundant because of the lack of beautiful people willing to create offspring.
3) There was an article I read a few years back concerning the increase of harmful particulates in the air encouraging birth deffects and long-term health concerns with every succeeding generation. I suppose we could evolve to adapt to those conditions, but I'm not entirely sure how that'd be possible or in what form it would take. I suppose that people with a greater affinity to resist harmful side-effects of such chemical exposure would be the answer, but I'd hardly see how they would look any different.
4) Poor families hare more likely to have more kids than affluent families. Whether or not this is has a direct relationship with IQ or some biological quanitifiable source is debatable, but if there holds a strong relationship between capacity for learning and income level, then I'd say the world would be becoming more and more iditotic.
Now, of course, this doesn't take into consideration equality of education, social conditions, or any real substantial logic
In all honesty, I''ve no idea what the possibilities would be. I'd have to say that somewhere down the line someone will have a strange physical anomoly that will give them a major advantage over the rest of the population. Maybe something like Asexual reproduction, who knows.
Personally I think out evolution will eventually be controlled by the discretion we use for scientific modification; gene alterations and the like.
