I dont think they can restrict directly, but indirectly put their streaming priority lower than other websites and users will complain about Netflix HD service etc... this is realling going to turn into extortion. Seems like NFLX is already paying premium for not so content. Now they may have to pay to use the highways. Toll. Profit margins going down. NFLX has to be planning a stock sale in order to raise the necessary cash ASAP!
Can't blame Comcast, I was considering to cancel comcast and keep netflix, but I decided to cancel netflix instead and try to enjoy the on-demand (hard to enjoy). I may end up staying away from both and relying upon antenna and library dvd collection.