I’ve always been a fan of automatically updating random wallpapers on my computer desktop. It stimulates the mind and breaks the monotony of working at your computer each day. But wouldn’t it be cooler if your wallpaper updated every minute instead of every day?
The wallpapers can be drawn from webcams. You should be able to choose the webcam source. Perhaps it can be the traffic. Or maybe a view of the pandas at the zoo. Or you might even link it to your own webcam, maybe looking out the front of your house. A website could be set up with webcams at different scenic locations throughout the world.
A quick Google search turns up some implementations of this idea, though I’ve never heard of any of them: