Okay, so on the surface, the videos appear to be little more than an Anime fanboy's dream come true. But see past the robot geekiness for a moment, and you realize something. Those arms actually move, and it doesn't take much to operate them.
Kogoro Kurata took the concept of a master-slave system, and made it a reality. Manga artist and designer Shirow Masamune, in his 1992 book Intron Depot 1, explained the concept this way:
The master arms have small joints that correspond to the shoulders and elbows [...]. You control the slave arms as if you were manipulating a small puppet in front of you.Now, I don't know if Kurata was the first person to manage this. If others came before him, he's simply getting the most press right now. But this is a technology that has some real potential. Although the Kuratas robots are artworks, and not "real" vehicles, if someone takes that idea and expands upon it, it could open up a wealth of possibilities. It's the combination of "what if" and "I can do that."