Shown are transluscent dialog boxes, attached to the windows to which they pertain. Default buttons that pulse from fully transparent to full color. The dock, a storage space for any item. Full photographic preview icons. The trash now resides in the dock.
Translucent menu's that fade away when dismissed.
The message he was sending is clear. OS X is the future and Apple is comitted to this direction. It will only get better in coming months. Many expect Apple to release a major update this summer, at MacWorld Expo, to address outstanding issues. A foundation you can build on Mac OS X applications take advantage of a scalable operating system foundation based on the proven Mach kernel and BSD 4.4 technology honed by years of industrial and academic research and the same technology used to run much of the Internet.