NEW FEATURE: Comcast is rolling out a new TV platform that does away with the hard drive and saves your TV shows online. No more worrying about your DVR filling up. The X2's channel guide acts more like a website than traditional channel guides.

HOW TO GET IT: X2 is akin to a new operating system for cellphones or computers and will also work on existing X1 set-top boxes through an optional update delivered over the Internet.

THE CONTEXT: X2 is one of many offerings from cable TV companies in their effort to improve the living room experience.