Several of them likened the conversion to Carbon to be about equal to the conversion from 68k code to PPC code. Afterward, David hung around and answered questions. For this session Don Lindsay, Apple's head of the Human Interface Team spoke. There is no other. The newness of Aqua is a clear, clean, light, fresh and crisp UI full of subtleties.
Color is used for selected widgets as well as controls in the title bar.
Behaviors are meant to provide more direct manipulation and provide more informative feedback. UI features provide better focus on task, reduced modality, and better management of clutter. Only one window will ever be open at one time. The user should never know the difference. Can use old icons and then design new 128x128 ones.