Now, this update brings some good opportunity to download the beta version of SteamOS as it has the dual-boot feature as well as custom partitions in expert install mode. In case you need some sort of system recovery, there's also an opportunity for you to burn the software to the DVD for that. However, since this is the beta version, expect a bunch of bugs to pop in and especially when you're using the prototype versions of other OSes like I had already used before. Sure, the users may be a little bit annoyed when those happen but then, this is the prototype version and hopefully, more things can be functional in the final version.
Final version? We don't know when but we assume that it should be released sometime this year and we know that Dell's Alienware is releasing their Steam Machines in September.