screen saver
–noun Computers. a program that displays a constantly shifting pattern on a screen when the computer is idle, originally used to prevent damage to the screen through continuous display of the same image but now used primarily for decoration.
desk·top –noun 2. Computers. the primary display screen of a graphical user interface, on which various icons represent files, groups of files, programs, or the like, which can be moved, accessed, added to, put away, or thrown away in ways analogous to the handling of file folders, documents, notes, etc., on a real desk.
Deskscapes/Dreams are NOT screensavers. They are animated desktops, and they do it in a method that was not available in XP. The concept is not new however.