That depends on the timescale. While Google is winning in 2016, in 2006 we would definitely have been saying Microsoft had won. Nobody knows who will be winning in 2026.
- Microsoft got so good and prolific at fighting on their terrain, they overspecialized and forgot how to win anywhere else. Once their opponents stopped stepping on their terrain, MS started losing.
- There's no such thing as the first browser war or the second browser war or the operating system war, and there's no such thing as winners or losers. There's just a never-ending sequence of skirmishes and battles.
