The Steam Machine is here, and despite an (isolated) issue dubbed the "red line of death" and performance that has been a little underwhelming, those who own the machine seem to be enjoying it. Either way, its egregious $1,000+ price tag is hardly Valve's fault, but rather a reflection of the wider industry as memory prices continue to climb.
The good news is that Valve has now released official Windows drivers for the Steam Machine, reinforcing that it's still a PC at heart. If you want to install Windows instead of SteamOS, you can, giving you the freedom to do pretty much whatever you want with the Gabecube that you own.