My wife streams Russian TVoIP (in HD) on the living room TV, my kids watch children's programming on Netflix and I pretty much just watch Netflix as well. In a week, I doubt if we watch an hour's worth of regular cable. I've breached Comcast's 250GB ceiling in the entire 13 months I've had Comcast. To be fair, they never sent me any nastygrams or otherwise restricted my service. Last I checked, they removed the link that showed me my usage but prior to that, we always exceeded 300GB.
I knew it would only be a matter of time before the cable companies went this route, especially with customers like me who scaled back their cable plans while eating up GB by streaming video content.
Want to really burn some GB, try Veetle.com. Its like 30+ HD movie channels (of questionable legality-lol) They claim that since they are “chatting” about the new avengers, Battleship, dark shadows, etc movies then it falls under fair use clause.