Paul Levinson, my grad school thesis adviser, has a theory called anthropotropism. Roughly outlined, it states that as new media develop, they mimic, more and more closely, the characteristics of the physical human body.
I was reminded of his theory looking at CNN's "hologram" technology, where reporter Jessica Yellin was reporting from Chicago but appeared to be in studio with Wolf Blitzer, in a Star Trek "Beam me up, Scottie" sort of way.
Hoorah for the advancement of technology ... . It's still a little freaky to me, but maybe that's just because my greatest childhood nightmare was this.