Maybe Valve will put Wine into the Steam OS for older games ?? they did have some good bug fixes this time
Nope. They absolutely want game vendors to put some real effort into making the best possible linux ports of their games, instead of just relying on this wrapper to get a "decent" or "good enough" result. There must be no other way of getting into Valve's console game marketplace than that.
(Consider the following: If your game can be played on a steam machine only by streaming it from a (Windows) PC, your customers will start to demand that you get your game ported to SteamOS. On the other hand, if your game would already run on SteamOS through wine without you putting any extra effort in properly porting your game, Valve would only be taking a risk of their customers getting a bad experience of their gaming console.)
And how do you even define an "old" game? Half-life 2 from 2004, and even Half-life 1 from 1998 got ported to linux this year.
If people want to hack their steam consoles into running old (or new) Windows games through wine, that's fine, but better not advertise any official support for it.
Isn't valve getting amazing results under Linux with Source? o.O I know L4D2 was running faster than the Windows version was
It's not even a full Linux port. For example on TF2, the -dxlevel XX launch option still manipulates how the game displays things. It's still using partial DirectX code that gets translated into OpenGL which causes an overhead which results in poor performance.
Just look at Steam for Linux community forum, dozens on dozens of threads concerning poor performance of source. People with extremely high end computers with CPUs like i7's and GPUs in the high end series are getting like 40 FPS (and incredibly choppy unresponsive gameplay) on TF2 (300+ on Windows) with vsync turned off both ingame and control panel.