At the Tokyo Security Show 2004, quite a few cool security products were displayed. The neatest to me is the security robot for the home that can shoot paintballs and create a smoke screen... I wonder how this might be updated for the U.S. market... ;)

There are also a number of other neat things such as a system that photographs people messing with your front door, and emails a picture of them to you immediately!

You can check out a video news story at FNN.