Oh, you turn your computer off? How do you deal with the wait when you need to come post here? But yeah, if you don't leave your PC on all the time, having a low-power server would be nice. Also the central back-up is a plus when multiple machines are involved (I try not to involve myself that way at home--get enough of that at work). Still, I'd put together a purpose-built machine before I'd buy this, but that's me.

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris