An array of demoes were played one after the other. In one we were in a room with a mirror. In that mirror, we were able to see a set of masks, each one following our own face as we moved from side to side. Our faces can be tracked right now in a soft of flat manner - smiles, frowns, and all manner of funny faces might be next.
Another demo showed a rubber duck and a couple of robotic arms, not unlike the helper droid in the first and second Iron Man movies. These two robotic arms moved toward us and very near us - it was here that we realized we could duck.