Ubuntu – Unity doesn’t hide in VirtualBox Fullscreen Mode

I'm not sure how closely these points represent the plans for Unity on the desktop.

That blueprint (or "blueprint entry", since there's no actual specification linked) does not represent the actual plans for Unity. It wasn't registered by people working on or planning Unity; it was registered by a community member as a proposal for the discussion of his idea at UDS, and since what it proposed overlapped largely with what the Unity people at Canonical were already planning internally and were about to announce at UDS, it was set as approved for discussion. As such, and as you noted, some of the terminology is off.

To get an idea as to what the plans precisely are, I suggest waiting for the actual blueprints to solidify and get approved in the coming week or two, and keeping an eye on design.canonical.com. If you're impatient, poking around the Gobby documents might also reveal some hints, and you can always ask around on IRC and the mailing lists.

This is a commpatibility issue. You can try by changing the graphic plug in in pcsx