When using cable boxes from your service provider, in order to watch TV in more than one room, you would have to rent more boxes from your provider. Instead, you can install a multi-room video system and stream video and TV from multiple sources, these include web, Satellite, Ariel, Apple TV, Amazon Fire, Google Chromecast, cable provider, hard drive, DVD/Blu-Ray, etc, to any TV in your space. All of the necessary hardware (players, hard drives, cable boxes, game consoles are stored centrally, cleaning your space of unsightly equipment and clutter. With a distributed video system, that is properly designed and installed you can enjoy all of these sources (and more) on any TV connected to your system. Simple.