One of the defining qualities of human beings is the urge and the ability to transcend past limitations through self-directed action. This essentially makes a definition of human beings a moving target. This is our wildcard, and it represents our greatest potential and greatest curse.
Increased popularity of digital socializing to the seeming detriment of physical socializing has some concerned. On the other hand, it is just a symptom of an ongoing gradual merger of human and technological. Becoming dependent on a yet another new technology to change the way we do something? We've done that so many times before.
A very interesting paper on the effect of Nano-Bio-Info-Cogno (NBIC) technologies, empowering directed human evolution and transhumanism, on global security. These technologies seem inevitable and allow for powers yet unimaginable for human beings. However as of now most humans don't appear to be ready to handle such power. And this is mainly the problem this paper focuses on.