Natural evolution is pretty much done for Humanity, unless civilization collapses, especially in terms of natural selection. Technology pretty much negates that already. Sexual selection has been far more important in the biologically recent past. Currently, medical selection is the most important factor, but that will be reversed by genetic medicine in the next century or two. What Humanity looks like in 100,000 years will be determined more by how we consciously decide to integrate biotech with ourselves than by any natural forces.
Actually, the consensus view is that humans are still evolving. For awhile there was a popular theory that we'd sort of technologized our way out of evolution, but that's been thoroughly debunked with a more modern understanding of how evolution works, and with more complete research into genetics.
How so? Even in what the first world would call the most primitive cultures, what can natural selection select? These days, what does faster/smarter/stronger offer in the way of survival? Even if the elite, athletic, beautiful types have a procreational advantage, our sedentary lifestyle has ensured fat, ugly, lazy people will find fat, ugly, lazy mates. Though they may be less ambitious, they will still have the reproductive drive and they will pair off with the best they can muster. If anything, as the "beautiful people" become more selective and refined, and as the indolent become more numerous and willing to take the best that is available, humanity could actually veer off into two different species.
