Here is the Graphisoft product page.
Here's a short feature list. It reflects my personal biases. Things they are really excited about, I might not even mention!
• PlotMaker is no longer with us. Layouts are part of the project. For large projects, it might be advisable to have the model and layouts in separate files, but they would both be PLNs.
• There is a cutting plane associated with each story, which can be used to automatically display roofs, and other elements, with their true relationship to the current story.
• You can create custom profiles for walls, beams, and columns. I'm not so excited about the beams and columns, since they have no parametrics, but the walls have a lot of potential.
• Interactive Schedules have finally reached version 2. They are greatly improved, and we will use them more and more. Most exciting: Automatic drawing lists.
• PDFs can be placed in layouts.
It is slated for release in the first week of May.
We will not rush into this one. As of this writing, I do not plan on migrating projects. That is, if you started in 9, you should finish in 9. And, I don't have templates for 10 yet. So you can't start new projects in 10 either.
10 is a worthwhile upgrade. But it will be quite different, especially in the documentation area. AC9, and our AC9 methods, are very reliable and not to be abandoned lightly.