Is A Terminator Scenario Possible?
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I believe ↑↑↓↓←→←→BA will suffice.
And what about war? Assuming we don't get "self-aware" machines, it seems like humans would derive their power based on the capabilities of the computers and robots they control. Then of course, natural resources also come into play; you can't build machines without materials and you can't run them without power. In the end, I think it's much more likely that the war will be humans with robots versus (other) humans with robots.
Pieces of our bodies and minds will slowly be replaced with enhancements and superior components as technology evolves. I have no idea what we'll end up as, but it's probably going to be different than what we are now. Evolution didn't reach perfection when humans evolved. There are plenty of area's that can be improved.
The beginnings of this are already happening. Computers are an extension of our social existence. Technology is getting closer to "jacking in" to the mind, Matrix-style (http://www.engadget.com/2007/12/07/researcher-claims-to-read...).
So will there be a human vs. robot war, Skynet style? I'd bet probably not. Skynet turned on, became self-aware unintentionally (AI's one hell of a "glitch" to code up!), was plugged into the military, and did its thing instantly.
AI of that magnitude probably won't come-about suddenly. Rather, gradually, like in evolution. It'll probably be built into us as it evolves. So if Skynet-level AI does develop, each human mind will probably already have its own copy running locally. It'll be pretty tricky for 1 instance of Skynet to outsmart 10 billion other instances and take over the planet...