Here is a video presenting the video-conference solution: Cisco TelePresence Meeting. It shows a meeting gathering a person talking at distance and an hologram in the same room.
The video is indeed sensational : it does look like an hologram. Although it appears on a huge screenplay in a dark conference room. Video images are high definition and human sized. As to technology it is no real innovation though.
Here is another one, less sensational but the concept happens to be more understandable: