I've looked at Magic Window a couple of times, first for the iPad and then in its OS X incarnation. The Mac version of the app has been updated today and now includes a total of 60 stunning scenes to spruce up your desktop or to use as a screensaver. The app is also on sale for $2.99 to celebrate the release of Mountain Lion.
On the iPad or any iOS device Magic Window provides pretty time lapse images, but because of multitasking limitations in iOS you can't do anything else while the images display. On a Mac
