Guys, I'm not sure if some other source mentions this but I have confirmation that Wine is NOT involved in any of this VALVe Linux business.
Some people had concerns that we would just get a shit port of their Windows build with a bunch of Wine patches (since it would still be technically "native") - this won't be the case.
I don't think they allow TransGaming ports (basically wine) in Mac Steam.
Edited:
If they won't it's pretty trivial to extract the .deb and transform it into an usable package for, say, Arch.
In fact that'd mostly involve moving out some excess files in the PKGBUILD.
The only pain is if they do what the Spotify Linux client does and use old as shit OpenSSL 0.9.8 when your distro is halfway up to date and has OpenSSL 1.0
It works, but you have to symlink the libssl10.so to libssl0.9.8.so.