Here's a DARPA video showing a robotic pack-mule prototype. I think you're supposed to imagine this thing being on your side, but when I see videos like this, I always find myself imagining what it would be like to be crouching in the underbrush with a couple of terrified children, trying to keep them silent while this thing motors through the uncanny valley around us.
This video depicts field testing of the DARPA Legged Squad Support System (LS3). The goal of the LS3 program is to demonstrate that a legged robot can unburden dismounted squad members by carrying their gear, autonomously following them through rugged terrain, and interpreting verbal and visual commands.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.