Home Entertainment is not only movies and music but also gaming. For that matter, you have quite a few choices but, when it comes to home gaming, they are mostly in 2 big groups : PCs and Game Consoles.
Gaming PCs often need to get the latest gear and come at a rather high price as well as in big form factor. I will for sure nourish the troll topic of Gaming Consoles versus Gaming PC but I truly believe that when it comes to living-room gaming, the consoles have a definite advantage as they are much easier to setup and also have a form factor that let them sit beside the TV without becoming the eye magnet.
Although their main purpose is gaming, the latest Game Consoles also provide a very good platform for the Home Entertainment with access to Internet, music/movies streaming services, instant messaging, social networking,… Actually pretty much everything that you can do with a PC when it comes to content consumption. Manufacturers are also putting great efforts to expand the functionality.