Outside of a community of techies, I'll bet they're absolutely right that there's no demand for it. I have Verizon FiOS right now, and pay $75 for basic TV and 25Mbps internet. I could upgrade to 50Mbps for maybe $10 a month more, but I just don't see why. I do stream a lot of Netflix, rent TV shows from iTunes, and watch MLB.tv during the summer. I've even been known to DL the occasional multi-GB torrent. I'm sure that puts me in the top 10% of bandwidth users in the USA, if not the top 1%. The extra $10/mo would not be an issue. But... why? I just don't see that it would be useful or even noticeable.
I get the whole "640k should be enough for anyone" argument here, but I don't see it coming imminently. What REALISTIC application is there for Gigabit internet for the average consumer that would drive a telco to install it at the present?