Last night I was watching TV. There was a show about exoskeletons and robots overall, and they show an experimental exoskeleton thingy made out of titanium. Then the host of the show puts on 60+kg's of firefighter gear and is heavily weighed down, as you can imagine. Then he gets to test the titanium skeleton/robot thingy, and with the help of it, that weight that was just way too heavy, now weighs almost nothing.
Then they show, what was considered to be the first robot of the world, it was a "robot" built by Da Vinci, more precisely a mechanical knight.
Extra info about it found here :
http://en.wikipedia.org/wiki/Leonardo's_robotSo I though to myself, if we have steampowered TANKS, how can we not build a steampowered knight?
Maybe like monstrous infantry, I don't really know just throwing this out here.