Security is getting to be one of the biggest things around these days and I am not a hamster, I'm certain that as long as people live in fear of one thing or another things like PC Security Cameras are going to continue to grow in popularity and show up in more and more places.
From any business with inventory that they don't want "waking away" to parents that want a hidden "nanny cam" to make sure the babysitter isn't hurting the children... more and more people are opting to use both visible and hidden security cameras and monitoring systems
This is why companies like EZWatchPro are gaining popularity with video surveillance systems designed for do it yourself installation. They specialize in selling easy to install systems designed for school and commercial security as well as home security needs and offer expert support on all of their cameras and security systems. When I was looking over their site it looked to me like they've got just about any security monitoring equipment anybody'd ever need.