There is some evidence of this feature hidden in Expose already.
download "xupport 2.0b2" off macupdate, and you'll see there is a "desktop box" option under settings > expose, as well as the "blob" feature (which i think is far less userful).
With this, hitting "f11" will hide all open windows into a small box. This box can be dragged anywhere on the screen, and can be restored back by hitting "f11" again.
One can also open up new windows while the former desktop is still "boxed"
This -borders- on virtual desktops, but is limited in functionality.
Here's a screenshot:
download "xupport 2.0b2" off macupdate, and you'll see there is a "desktop box" option under settings > expose, as well as the "blob" feature (which i think is far less userful).
With this, hitting "f11" will hide all open windows into a small box. This box can be dragged anywhere on the screen, and can be restored back by hitting "f11" again.
One can also open up new windows while the former desktop is still "boxed"
This -borders- on virtual desktops, but is limited in functionality.
Here's a screenshot: