Left 4 Dead 3 has been leaked via an office tour: http://kotaku.com/valve-tour-leaks-left-4-dead-3-1036602962 So, I'm not exactly holding out hope that they aren't going to announce new games. If one uses the circle symbolism, we're given a circle as the first symbol. The circle represents SteamOS, as we know. Then we have the second symbol, which is a circle in a bracket. There's a few different ways to interpret it: SteamOS is used on a piece of hardware (The circle is contained within the brackets, brackets being hardware)SteamOS is included with a piece of software (The circle is contained within the brackets, brackets being a piece of software)As to what this hardware is, we don't particularly know yet. Though one user over at Kotaku made an interesting theory about PS4 + Steam hardware linkage. This brings me to the third symbol. We have the third symbol, which is two circles being added together. There's a variety of different ways to interpret this: SteamOS (software) included on hardware (Steam box) will include software (games) which can possibly be newSony + SteamOS linksBetter social capabilities via said hardware...since SteamOS is a circle, which could represent a player also, the second circle could resemble another player