One of the perks of being the nation’s largest cable operator: a general session demo slot. Comcast (NSDQ: CMCSA) Chairman and CEO Brian Roberts used the time for a demo of one technology the company hadn’t yet decided how to deploy — 1 Gbps downloads over a cable modem, which we were first to report. But most of the demo went to Xfinity TV features already used in Comcast’s Augusta, Ga. system, including nimble and robust search, apps and DVR management. One new feature is on the way: Facebook Friend Trends, crowd-sourced programming recommendations. Check out the video, embedded below.