Oh please, like such streaming during the Olympics would even approach about 100Gbs unless you are streaming for a week straight.
As for if 720-1080p streamed content would ever become, it is all a matter of how highspeed broadband rollout goes and how many media outlets adopt it that would force ISPs to rethink their current constraints. Akamai already established one way to efficiently stream such content (click at your own risk ).