Hello,
I just don't think that the majority of people using NetBSD are doing so primarily as a state-of-the-art gaming platform (though I'm sure with enough tweaking, it could be such). And I can't really think of too much else that requires up to date 3D abilities (well, actually I can
).
And I think that the first great hurdle for 3D usage in NetBSD, before deciding XFree86 or X.org, is to get fully supported device drivers for video cards - first and foremost nVidia.