Then those people (relitively few of the general population) may need a faster "business grade" ($$$) connection. for the purpose of residental broadband DOCSIS (and in some cases ADSL2) are just fine and will be for years to come.
What a smart idea! Unfortunately you have conviently seemed to have forgot that they dont offer a faster "business grade" connection, business connections simply just have a better SLA, the speeds are the same for 2x the cost, stupid imo.
I didn't say it would be from ComCast. Those users may need to pay for a dedicated line from their telco or other provider. Then they'll see the true cost of a real High speed business connection. ComCast business is starting to offer higher speed commerial lines to traditional core business areas, but it may be a while before they offer that in all residental areas.