I keep seeing this argument that there are no games for Linux so nobody will use it and that since nobody uses it then nobody will make games for it. I honestly don't get it. This is like saying nobody will buy a PS4 or XONE because they dont have many games. Their launch lineups are dismal. But people will still put their money and faith into those consoles. They will sell and games will be made. Lets look at the launch lineup for SteamOS. I am assuming that all current Linux games now on steam will be supported. Go to Steam. There are currently 184 games for Linux including Dota 2, Europa Universalis IV, Gone Home, Kerbal Space Program, Amnesia: A Machine for Pigs the list goes on. Sounds a lot better than a PS4 to me. There are 6.5 million unique users on Steam every day. That is many potential users for the new SteamOS
Now why does nobody currently use Linux then if it has these games? Because it has never been pushed. I can see Valve releasing releasing Half Life 3 exclusively or at a discount to entice people to switch. Any sort of exclusives that Valve can get for the platform will help it to grow, just as it is for the consoles. Also, Valve is claiming performance gains which is another attractive feature as is being able to stream games around the home.
Am I completely wrong?