Blind spot detection certainly sounds it has potential to save lives, prevent injuries, and reduce collision damage. What about adding in a feature to flash a warning light on the side of the vehicle that is about to be hit to alert the driver in the blind spot to back off. Having both drivers alerted by the system to the impending collision might further reduce accidents.
The new features on cars are really cool. I looked at a Ford Edge a couple of months ago. The blind spot detection is a feature I would really like to have. I wish the drivers that keep cutting me off had that feature too.