We are approaching release. We are probably going to release smaller beta versions more often, until we reach a point where we think one of these versions will be the public release.
Besides the last few bugs and optimizations, there are also several things that need to be done before the release: the website, video trailer, migrating the licensing system, documentation and tutorials, as well as creating Skatter compositions for vegetation assets in the 3D Bazaar (this list is not exhaustive).
So probably still several weeks of intense work.