I just wanted to mention that I tested the Steam In-Home Streaming option yesterday. I had an older box laying around so I threw Ubuntu on it, loaded the steam client on it, and was able to launch any Steam title installed on my primary system. The "host" must be a Windows PC, but the "client" can be Linux, OSX, or Windows. Over wireless it was a little laggy, which their documentation forewarned of; however over wired it was pretty much flawless. (To be fair, the wireless card on the client box is a 1-antenna 802.11N USB dongle that was a bit far from the access point; wireless is likely much better under more ideal circumstances.) I used Fallout: New Vegas as a test and was able to play it on the Linux client with ease. All of the hardware rendering etc occurs on the host machine. The game actually launches on the host computer and then streams the output to your client, as well as processes keyboard and mouse input from the client. Anyway, I'm not too sure how many people are aware of this new option, but it's a nice way to play a system-intensive game on, say, a Macbook Air across the house from a gaming rig, or to use a HTPC to play your favorite PC game on your TV without moving the gaming computer.