Most people are stuck with something between their speakers.
Period.
The thing to discuss is not how the ideal room would or should be unless the point is to the futility of the idea. I'd love to have the wherewithal to have a dedicated listening room but I'm with the majority on this: I can't.
So, getting back to the OPs question, if you can isolate, as best you can, the equipment off to one side and not in the soundstage you listen to, then by all means, do it.
As for the rest of us, throw a big, wool, army blanket over your widescreen and rack and make sure your speakers are forward of the stuff between and see if it makes a difference. That's the advice I was given on another thread here and it worked. It was a very minor improvement, but it worked.
I no longer do it because of the hassle.
All the best,
Nonoise