At a minimum you need a TV with a cable card slot since Comcast is encrypting the digital channels (except over the air HD channels). - Not all over the country yet but they are doing it. If you want video on demand (VOD) you need two way communications so you will need a Comcast HD box. Down the road a one way cable card will limit your choices even more since Comcast will be going to a switched network for at least part of its channels (two way communications necessary). Bottom line: a Comcast cable box is your best bet until TV's have circuitry for a two way communication cable card or built in conditional access circuitry.