Of course we have undergone positive changes over the past ten thousand years. We still will undergo positive changes, and these will have an effect on how we're able to survive diseases and occurences such as climate change. Evolution can also take place based on how we percieve beauty. For example, if we find blue eyes to be a desirable trait, those with blue eyes will reproduce more. Hence, more blue eyes.

It is interesting to think of the possibilities of how the human race will evolve. For example a holocaust, nuclear war, or other violent attack on another nation or race would most definately affect the human race. While artificial selection may now have a bigger role than ever before, natural selection cannot be ruled out. Natural selection includes disease (which has an extremely high chance of occurring and wreaking havoc) and other events such as global warming or an ice age.

Yet we will not branch out into any new species like some believe. That process, called Speciation, relies on isolation, something that is basically unheard of in today's world. For example, Darwin's finches were able to evolve because they had been separated across the Galapagos, adapting to each island's different features. Humans live in a connected world, where people can go anywhere they want, and are not stopped by geographical barriers. The other two major factors of isolation (temporal and behavioral) may still have some effect on mating habits, but they will not stop the inevitable flow because both are pretty much obsolete to humans. Sorry, but no new creatures will be branching out from us unless a worldwide segregation occurs.

While I do feel humans will eventually have a noticable difference in their phenotype than our current selves, it will take thousands of years because of our ability to adapt through technology and the many differences our race has.