Perhaps the most obvious impact will be the ability of the TV service to drive the adoption of tablets even further; subscribers will get a Nexus 7 tablet included in their package, allowing the device to be used both as a remote and as a way to view TV (both live and recorded). Phone will also be able to act as either remote controls or as viewing devices. With the ability to store up to 500 hours of recorded content and simultaneously record (or stream) up to 8 1080p video streams at once, there will be little to stop every member of a household from consuming the content they want whenever they want it.
Whether Google Fiber + TV itself catches on, or even if it merely inspires other broadband carriers to up their game, it could transform the role that our phones and tablets play in our daily lives, and also make home automation via mobile devices (e.g. Android@Home) even more intuitive as we naturally get used to controlling everything from tablets and phones. It could also help make tablet computing even more ubiquitous, which would be an impressive feat, considering that tablet computers are currently on a trajectory to replace smartphones as the most rapidly adopted technology in history.