It is the second Day of Valve’s announcements and many have correctly predicted what it will be. Steam Machines are a set of hardware that will run SteamOS. Instead of going the console route of having designed hardware, Steam Machines will be developed by many different manufacturers.rnrnThere is also a contest where Valve will be giving 300 Steam Machine prototypes to Steam users. If you have an account and are interested in having a Steam Machine, sign up.
Friday will the last announcement. This announcement has confused the most people as to what it may be. The symbol is a o + o. o has been used for SteamOS and [o ] was used for the Steam Machine. Understandably, the guesses have varied from a controller to cross OS interaction. Some have even said Half Life 3, but they also tend to say that at any Valve announcement.