What else can I determine by this? Well it depends on what you consider "most" to mean. If most of the Autodesk 2010 products are based on AutoCAD then I would wager that means the apps based on AutoCAD will be ready then. That also means by definition that non-AutoCAD products won't ship then. Again, no big deal really but this is an interesting tact by Autodesk to drive interest before the program is out.
I personally have a lot to do when AutoCAD 2010 is out. The custom menuing system I use has both toolbars/pull-down menus/ribbon tabs. We have decided to fully support the ribbon interface and nix the older menu bar and tools method for accessing commands. I';m sure a number of people will be lost but there is no time like the present to adopt the latest user interface trend. I say trend because we all know it will change again, some day. ;)