The following is a recorded gameplay demo of the first mission in The Secret World. Apparently, this video is uploaded onto Youtube by someone who attended the New York Comic Convention '11.
After going through this video, I feel that The Secret World is kind of like a fusion of two games - "Hellgate" & "Half-life". It inherits the good points in these two games and further polishes up on them.
If this is the sort of gameplay and fabulous storyline to look forward to, I definitely feel that The Secret World will offer gamers a truly unique experience.
The full one hour video of the NYCC '11 Panel hosted by MMORPG.com:
http://www.mmorpg.com/gamelist.cfm/game/404/view/videos/play/2084/NYCC-11-Panel.html