Much higher quality. There is something in our animal selves that demands a certain threshold of realism, which these new systems have. Technically, it's just

Much higher quality. There is something in our animal selves that demands a certain threshold of realism, which these new systems have. Technically, it's just higher resolution, faster connections, better screens, better cameras, etc., but the total effect is greater than the sum of parts, as in the system replaces plane tickets instead of phone calls. This article in the economist was good, but now behind a pay-wall: http://www.economist.com/business/displaystory.cfm?story_id=9687655 http://www.economist.com/business/displaystory.cfm?story_id=...