Dell introduced a new Latitude E6400 notebook today, one of the interesting (optional) features of this laptop is an electronic privacy screen. This feature can be turned on via Dell's ControlPoint software and will make it harder for other people to see what you're doing on your system:
The Latitude E6400 is available with an optional electronic privacy screen. This software-driven display creates a pixel-based pattern on the screen, reducing the side viewing angles of people seated next to the user. It has minimal impact on display brightness and is activated with a single touch key combination or through Dell’s ControlPoint software. Users don’t have to keep up with separate plastic screen inserts and can have a better viewing experience while keeping data on their screen more private. The option is $139 and available globally today.