I love those previews. With things like this we can start talking louder about position of Linux as a desktop solution on the market. Not because it brings the new quality of work, but because it brings high-quality UI and modern effects to us. When Windows XP appeared, Linux was light years behind, when Vista will come, we will be there!
After watching this videos, can you name any of the “so great” visual improvements in Vista that could beat MacOSX and Linux?