[ISPs] have moved beyond just delivering a internet connection to delivering "triple play" (net, cable/streaming, voip).

I thought this bundling was more to protect their profit margins. In Canada, for example, Telus has cable, internet, cellphone, house phone products available. For every product line you purchase, there's a discount. When they charge data overage fees on cell phones and internet plans, they make huge money, and subsidize the cost of running other product lines which help their lock-in effect. (Sorry for the poor wording)