Somehow I don't think either of Canada's 2 Cable Monopolies are exactly quaking in their boots. These same 2 companies are also the 2 largest ISPs.
If Netflix becomes too popular, they'll just throttle down the speed on this service and all of their customers will have to rely on regular Cable to receive their programs in "real time".
As for the Telcos that provide ADSL, this can be most accurately described as a dis-service rather than a viable service. Much of our telephone system still bears signs that say "Inspected by Alexander Graham Bell"!
Going to be a long time before Streaming Video becomes a practical reality here in the "Great White North".