Eric Schmidt was the headlining guest at the opening night of All Things D's D9 conference, and Walt Mossberg and Kara Swisher got the brainy Google executive to open up about the "Gang of Four" tech companies defining future platforms (hint, Microsoft isn't one of them), Google's struggles with its Music service (turns out they want to do a subscription model), why there's no third place position after Android and iOS and more.

[All Things D]

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