This may or may not be relevant to the discussion at hand, but me and a friend were sort of working on a UT map pack that had very basic architecture and used only flat, sparsely detailed surfaces with primary colors. It was actually a reaction to UT3 media, and the idea was to force a focus on the immediate gameplay by offering well designed battlegrounds without any of the background noise. We never got anywhere with it, but I still like the idea.
I'm starting to get real tired of clutter in general. Infamous is an upcoming game that looks absolutely awesome in terms of gameplay and overall content, but the cluttered look of it is pretty unappealing, especially after having played so many "texturezillas," and games that seem to pride themselves on coming up with new (exciting, supposedly) ways of simulating obscured vision.