I'm interested; I'll be trying the Nvidia binary drivers, as I'm trying to enable overlays/video playback acceleration. The nv driver does not support any acceleration (and vesa obviously wouldn't either, and I'm guessing fbdev doesn't as well).
Would it make sense to flag xf86-video-nouveau for removal (or moving it somewhere else), then, from the TCE repository? Since it'll never work without the Nouveau driver, it might trip up another newbie (like myself).