You say that as if there's a huge history of these companies' tech being used to enhance warfare.

Militaries around the world already use the Xbox 360 controller extensively. As well as Surfaces, and of course the obvious like Windows, Excel, Word, etc.

And before that, different versions of windows. I recall going for an interview with some sonar guys looking at using Direct3D back in the late 90s.

Don't think you need history to make a prediction of how history might change for well-thought-out reasons. And Windows is a key OS in many military operations/departments.

As an employee, you kind of need history to be able to make a prediction like that, otherwise you will be a bit surprised when you see your employer is taking on contracts to enhance the military, to speak to the naivete that was brought up earlier.

While Windows might be used by the military, that doesn't mean it was built to enhance warfare, the same way if the military used Ubuntu you wouldn't expect Canonical employees to protest about it.

There is. Silicon Valley was formed out of military projects.