He has a button on the side to turn him on, and his outfit lights up blue. Then, his face shield projects an image--two images, open mouth and closed mouth, actually--and he talks. He says different things. "I'm not a program." And so forth.
Oh. Did I mention he cost $15?
See more photos, including a full-length shot, on Flickr.
My kids have seen the original Tron, and they loved it, despite the lame-compared-to-today's-amazing-animation. They can't wait to see this one. (I can't either. I'm such a geek.)