whoa there sen, I think you've taken a few too many of those "minimalism" pills..
...and yes, all transperancies & animations are off, and the taskbar is on "auto-hide".
If you have trouble realizing wither your monitor is on or off I suspect you could say that clean desktop perfection has been archieved.
The black desktop does have some practical usage. First off I am bored of getting bored with desktop backgrounds.
Second the same computer is also connected to a projector. (my computer is something like a workplace/library/hifi & home cinema device)
Since there is no such thing as "black light", for a projector the solution to displaying it, is trying not to throw any. So if it is turned on, but not in the process of displaying something specific, it doesn't illuminate the space.