The presenter calls The Agency "24 meets Alias meets Counterstike," and that seems appropriate enough. The game can be played either in first person mode, or in a Mass Effect-esque over-the-shoulder perspective. It looks like you'll be able to run through instanced encounters with other players and/or NPCs, and there are scripted heroic moments in addition to the usual shoot-'em-up stuff. Our favorite moment occurs when the player revives a fallen ally with defibrillators.
It looks like the game borrows a lot from single-player game conventions, so it's not super innovative, but it's still refreshing to see an MMO that's not an action-bar-based, numeric-stat-grinding, sword & sorcery, D&D-style DikuMUD clone.