Well, of course they are "puckering up". How can Comcast cable TV sell video on demand, if Comcast cable Internet allows you to DL the same thing free off BitTorrent? Of course they are capping downloads. I think it sucks personally. Every day, I see higher and higher speeds for cable accounts. They are upgrading for their market place of HD films to sell, meanwhile, they will sucker folks to sign up for high speed connections to help fund their new business model. Having said that, these companies can "find" the bandwidth to sell us movies already, no problemo. They just don't want us downloading the stuff free.
The only folks that will buy Blu-ray, once they get a taste of digital downloads are those that want to have a library of films. I think it is possible that these folks will even get pretty picky and only buy classics or mega hits. Then, they will download "films" such as Hancock and Bart the Mall Cop.