Terminator, I would never kick you.

Robots rely on information technology, and as such they are developing on an exponential curve. It looks like we're almost at the elbow.

The U.S. military is investing heavily in automated forces. The Predator is already in use and will soon fly itself. We'll have "troops" in the air, on land and in the water 24/7. They never need to sleep and will never represent a pesky casualty. They'll be optimized for reconnaissance and death-dealing. I'm sure the Terminator model is coming at some point, but a walking gun will do fine until we (or they) decide they need to be as frightening as possible. Enter the 'BigDog.'

Yep, that's um...it, walking in the woods, carrying a nice heavy load for a soldier. To demonstrate how stable and reliable it is, you can watch a guy kicking it (hard) while it scrambles to keep standing, and they let it slip around on some ice. It looks cruel and strangely reminiscent of the backstory in the Animatrix. The pic links to a video.