The in-home streaming of SteamOS has been one of the major missing features since its launch. Over the past month, some people have been getting access to the beta for in-home streaming with mixed results. Getting into the beta is fairly easy, just requiring you to join the group for it and being randomly selected from there.
Today, Valve has updated all versions of Steam to increase the functionality of the beta. While it’s still not readily accessible to everyone, it seems to be getting closer as issues are addressed. These include support for non-Steam games with mixed 32 and 64-bit binaries among other things.
SteamOS will automatically update itself on boot, and so should the Steam client next time you turn it on.