Re: "This means Linus Torvalds has definitely won, doesn't it?"
I think you have missed the point. Microsoft are a co contributor to Chromimum.They have their own agenda and may stop Google dominating the Open Source project as they do at the moment,
If Microsoft had wanted to stop Google's domination in the browser arena, they should have teamed up with Firefox/Mozilla instead. All they do by pushing <u>yet another</u> Chromium-based browser is to increase the dangerous monoculture in the browserspace (kind of like we had when MSIE was the dominant browser).
But I expect the irony of teaming up with Mozilla years after they made every effort to destroy them would have made their heads explode.