How will emerging technologies change our human identity?

It can be seen that bioengineering is taking us in a direction where we will have the ability to alter our genes or design the genes of our offspring, and thus select desired characteristics and physical appearance. Also, development in human/machine interfaces will allow us to augment our senses, capabilities, and intelligence. This is the first time in the long history of life that any organism has been able to directly guide its own evolution. With this scale of biological control, it may not be long before we see individuals and groups greatly deviating from the human species as we know it.

Considering this, how will emerging technologies alter the way we define being human? Will modified humans diverge into what would be considered new species?