This is like laying a white sheet on your real desktop before putting your current work over it. A computer desktop shouldn't be used to dump clutter on.
Or I should say, you can "organize" your files anyway you want including just dumping it all over the desktop. But that's a personal choice. An application shouldn't "hide" this. If your desktop is so discombobulated it's distracting, perhaps you should consider another method of organization. Like, oh, I don't know. Putting music in /Music, documents in /Documents, photo's in /Pictures, and projects in a /Projects directory.
Of course you're right, but many people don't have an uncluttered desktop.
Also, this idea to "block out" and "take over" the screen is something many audio apps have.
I know audio apps are far from Photoshop, but it's still a part of CS4, just like PS.
With audio apps, I do see a point to it: When you connect your recorder (or your card reader or whatever), then most people drag the audio to the desktop first. That way, you know that what you have there, is the most recent, the raw "tape". You can move them, when it's done. Also, if I get to work on a computer that isn't mine, I don't have a filing system set up, so - at least with audio apps - I do see a point.
Another thing, you get a wee bit more real estate.
Come to think of it, I like this sort of thing, although I hated it with a vengeance for browsers back in the day. It helps me to become that more focused while using the app.
I hope you can disable it.
Yes, that should be a given. Are there any rumours that it might not be so?