>>497989That talk of rewriting it was for the 64bit client, which they released with 4R7.
It's never going to be full 3D, if it did, it would then perform no better than Mudbox or Blendshit. ZBrush performing so well relies on its unique approach to representing 3D shapes.
And given how well zModeler works, I don't see much of a reason to switch to a traditional polygon system.