I wouldn't mind seeing an ability to scan in your own gun, be it airsoft, BB, plastic toy, water gun, or real. Then use that in a FPS. Also scanning in your own face and pasting it to a model for the game. Maybe adding virtual scars, tatoos, or haircut. Also, I hate to say it, walking or running in an FPS should at least be an option to turn on or off. Imagine the exercise people will get with all the running around they do in those things. Add to that, crouching, going prone, or walking while crouched down. People will be whipped into shape in no time. Plus they are given a better immersion into the game, which is the aim in the first place. Running in place may seem goofy, but once someone is immersed into the game, they will do 20 minutes of exercise that will feel like 5. Plus more motivated to push themselves further. With all of that processing being done though, I don't know if they could sqeeze multiplay just yet, maybe down the road.