I wonder how long before Comcast drops most analog channels?

[radiotvnut]

A couple years ago, Comcast moved the Hallmark channel, the Gameshow channel, and Cspan to digital. Effective 11/4/09, they moved TBN, EWTN, the Inspiration Channel and the TV guide channel to digital. The movement of these channels to digital does not bother me; as I never watched them. Currently, the only thing on these channel positions is a message saying where the channels can now be found. I doubt they will be replaced with anything else. I just wonder how much longer I've got before most of the other channels are moved to digital and I'm forced to rent a cable box for each TV connected to cable? I think I remember reading where cable companies were required to carry local channels on analog until at least 2012.