I have been waiting for this game for a long time ! BUT does anyone know if it will be available directly - NOT through Steam ??
As long as they continue to make money on it through Steam, they have no reason to sell through other venues. I don't expect it to be released anywhere other than Steam any time soon -- maybe in a few years.
If you want to know the Syberia 3 story, check out a YouTube playthrough.
Be aware that Syberia 3 ends on a cliffhanger, worse than either of the previous Syberia games. So if that bothers you, you might want to wait anyway.
As far as I know, they're still using Denuvo DRM on it, which would make it inappropriate for any DRM-free download store. Google Denuvo to see why people hate it.