The Ideal Windows Desktop Manager

1. Provides between 4 and 9 desktops.
2. Inobtrusive, easy switching between desktops
3. Separate wallpaper for each desktop (or not, configurable)
4. Individual task bar icons for each desktops
5. Task list that summarizes all available tasks, regardless of desktop.
6. Easy movement of a window/task between desktops.
7. Sticky windows, i.e. one that is visible on all desktops.
8. Overview of what's on which desktop
9. Names for each desktop (optional)
10. Configurable resolution for each desktop (optional, bonus points)
11. Assign a desktop to a monitor, for multi-monitor system.
12. Saveable desktop layout. That is, to activate a layout is to start all apps that make up the layout, and set their windows to remembered size and positions. Assign a layout to a desktop, name them.
13. No weird artifacts or flashing.
14. Must not "lose" tasks or at least must provide a way to recover them if lost.
15. Imperceptible performance impact.