Yes it will be a few years before Comcast ends support for CableCards, but try and get one today. They are no longer buying them, most offices have none in stock, and they will just tell you they are no longer providing new CableCards. Once they transition to DOCSIS 4.0, all TiVo units will cease to function. Now when that transition happens will vary wildly from area to area, but Comcast came through our area a few weeks back and did all the last mile network transition needed for the upgrade. I am making plans to get off my TiVo and would never consider a new unit.Xfinity is our cable/internet provider and everything I have read on these boards says it will be "a few years" before Xfinity stops supporting CableCards.