iPhone 4S -- presumably on the allure of Siri. Well, that bodiless, digital lady helper's about to work her concierge magic on your cable TV. ActiveVideo Networks plans to demo an implementation of its CloudTV H5 apps platform -- including iVOD, amongst others -- to bring voice navigation to living rooms via your set-top box. After routing a user's requests over a cellular network, the company's servers do the heavy lifting and deliver the intended content and search results all supposedly in the time it would take to use a remote control. We'll be sure to get some up close and personal time with this voice-based interface at CES this week and let you know how it all pans out.