Possible areas for discussion:

The idea of using Mission:Impossible or sneakers as a template. Move the action into the real world, with real people playing your "point men". Using voice control to tell them what to do. View the world from cameras, sat maps etc.

Neuromancer style future. Cybernetic implants, jacking-in etc. Basically make snow-crash the game. Bring the world of snow crash to life. Lots of 3D graphics - full on visual feast stuff.

Further ideas for mission types.