...caps make little technical sense, and I believe that the fundamental reason for capping is to prevent disruption of the television entertainment business model that feeds the TV screens in most households.
For those of you who have been following Steve's "Kill Your Cable" posts, this is a must-read. For everyone else, it's a must-read, too.
It's becoming clear that most of what holds back any given technical innovation is social, not technical. This isn't to say all technical innovation is equally progressive, however. But we didn't have, say, videophones for decades for reasons that had nothing to do with their feasibility.
-- Serdar Yegulalp