If you didn't notice already Cubicle7 has published WFRP4 "Preview" version for Pre-orders. It is pretty much final product, but I think there will be many corrections still coming before it goes to printing. PDF does features final graphics, and I think all the rules are there... So, pretty much everything is there. And it looks good. Warhammer community blogs & sites will probably soon publish many reviews.
See more information from Official Cubicle 7: