What's next? All the interviews have to take place in a dark room so that the interviewer can't see the color of the interviewee's skin?
http://public.econ.duke.edu/~hf14/teaching/povertydisc/readi...
However, in cases where the quality of in-person interaction is a major part of what you're trying to assess — like for a team programming environment — it's going to be pretty hard to do anything comparable.
Obviously some level of programming expertise is required, but once you've crossed that minimum threshold, personal communication becomes a larger and larger share of an employees value.
In fact telephone, or skype, interviews for the first round is actually becoming standard in many fields.