Face Recognition on Snow Leopard? My Predicition

I have been a Mac user for years. My first Apple was a Lisa. Enough said there. I've converted enough people from Windows to Mac to earn an invitation to Steve's annual year end bash. But the reasons are not selfish. I just like to see people be productive, creative and enjoying their time with a computer.
 
Over the years I have watched Apple grow, fail and rebound. I'll be the first admit I didn't see many of the revolutionary products coming. I still recall, though, a moment in late 2001 when I stood in a computer store in Tokyo and saw the PowerBook G3 and the 1G iPod. I bought both on the spot and still have them. I knew at that point a change at Apple was underway. And since that time, Apple doesn't do anything without a strategic approach to product development and enhancement. Think about 'cover flow' and you get the idea. But I generally don't make predictions. Until now.
 
Apple introduced face recognition with the latest version of iPhoto. I think this technology was too expensive to develop and too valuable to leave alone. With most MacBooks, MacBook Pros and iMacs now equipped with iSight cameras, why not use the face recognition technology as a means to log in to the computer? When you start the computer or awake it, the computer reads your visual image from the camera and decides if you are right person. Of course, it should have a secondary back up password entry option. The idea seems also foolproof and seamless at the same time. How about it Apple?