I attended Google I/O this week, and saw a lot of cool things: but what really hit home for me, at the keynote and the demos and the developer sessions, was just how dominant Google has become, in so many different domains … and, especially, how its only real competition comes from the four other tech behemoths who dominate our industry’s landscape.

Typically, Bruce Sterling saw it coming first, five full years ago:

“The Stacks” […] Google, Apple, Facebook, Amazon and Microsoft.

When you talk about software, though — you know, the stuff that’s eating the world — then you’re almost certainly, if indirectly, ultimately talking about the Stacks.

Who in fairness are all doing amazing things.

Sundar Pichai mentioned during the I/O keynote that there are now more than two billion active Android devices on Earth.

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