This is exactly what will happen. It cracks me up how many people think they can finally put one over on the cable company when that exact same cable company provides the broadband through which their cable TV replacement will work. Of course those companies will increase the cost of broadband if this starts eating into their revenue numbers. They'll start talking up themes like "for high bandwidth users" etc and/or implement bandwidth tiers (much tighter than now). Sound familiar?
See that future. It's coming.
You assume everyone gets their broadband from their cable companies?