The web services business is a pick up game. Strategy rarely works when the latest trend is unpredictable.
Google is just like any other company, except their employees are more brilliant.
I don't see what the point of listing what each company wants to own.
Google often times holds hackathons and other events just to get a feeling of what people are using their technologies for. Or what they could use them for. They're extremely smart.
I've never actively seen Microsoft invite developers to the campus and see what they are using Visual Studio for.
I don't even think they care.
An example of this was popfly. Had they asked at least 5 real developers if they were actually going to use it in their real world app, they would have never released it. They're in their little ivory tower, and they're shut off from the world.
That's why their web services business is starting to lose money.