Maybe you'll see some benefit that I don't but in all seriousness, streaming arcade games just sounds, meh.
Put em in a decent Mame cab, or maybe two (one for horz games, one for vertical). Throw in a few pins if you like that (or a digital pin, dang I need to build one of those someday). Done.
Putting emulated console games up on the tv? Ok, that might be cool. I've never been a console gamer though, so I'm not going to comment one way or the other there.
As for music. Put your mp3's and vids on a central server, add JRMedia Center or Plex, or maybe XBMC, and you can stream your music to any device you'd like, though I only ever used it to play music by the pool.
None-the-less, pics of the process is always appreciated around these parts!