I have Xubuntu running on a ZaReason MediaBox. This is a simple system for playing movies and music. It is not a DVR (digital video recorder), and it doesn't need a TV tuner because I don't have any broadcast TV. No cable, satellite, nor over-the-air even. Don't want it and don't miss it. But if that's something you want you may have it, because Linux wants us to be happy.
The MediaBox is a little sweetheart that holds two 3.5" SATA3 drives and a CD/DVD drive. Mine is powered by an Intel quad-core i5-4430 CPU and 4GB RAM, and it comes with a nice batch of ports.