Of course there's going to be some stuff they've held back so that the OS2.0 headlines are "OS2.0 brings many new features" instead of "OS2.0 finally here". That's Marketing 101... Never mind, I just realised that I assumed RIM can do marketing...
Seriously though, since nobody's had the ability to play with the devices yet, only watch RIM people demo specific parts, I'm sure that they're purposely hiding some parts, some due to bugs and some so that there's the excitement of OS2.0 features many times over getting them good press each time.