It was probably a typo, cos I think what redman meant to say is that it'll only affect you if you have analogue - Freeview IS digital, so if you have it, you are digital.
Regarding the BT thing, do you need it. Ordinary Freeview provides a lot of channels anyway, and you can buy digiboxes that act like sky anyway (record more than one channel, hard drive recording, etc, etc). I don't get time to watch what is on mine!
Or there's freesat. Sky also do a version of there own called freesat, so as you have the installation, nothing to stop you using theirs.