Phil Edholm has been writing an extended blog about his concept of Communications Dimensions.
In his recent posting, Phil Edholm wrote that "telepresence systems have four distinct disadvantages; the cost of the base system, the cost of bandwidth and operation, the challenges to interoperability among vendors, and eye contact."
The first three are well understood, which is why telepresence solutions have become the executive jets of the board room.
But the last point exposed for me a key current limitation of these systems- even though they use HD full size video, the lack of eye contact creates a large barrier to effective interpersonal communications. In fact, my experience has been that a sense of lack of connectedness and aloofness is created when a remote speaker is talking to you with his eyes looking somewhere else.
This is clearly an opportunity for eye ball processing technology research.
But then, you don't want the system to automatically adjust a speaker's eyes when he's lying through his teeth by NOT looking you in the eye!