Follow the money!!!
DVR = Big profits. The current rental boxes have been bought and paid for by now. They won't let go of that nice rental fee easily.
hdtv tuner = little or no extra benefit to Eastlink, plus big cost to eastlink = $$$ if we all jump to the new tech at once.
old tuners kept in service also = big savings for Eastlink
They had no choice but to offer the new boxes as the old low def boxes have been discontinued and they are no longer buying into obsolete technology.
Mark my words. In a short time, low def will be gone and we won't be paying extra for hdtv boxes or services at all. This is the way satellite companies have gone, so in the end, land line will have to follow suit to stay competitive, but be careful what you wish for. Monthly fees will rise across the board to regain that lost profit. because satellite still can't offer the "Bundles".
They have us where they want us no matter what. Wait and see.