WinFS

originally intended to be implemented in Vista, the WinFS program was actually not stopped, but not implemented in Vista. It would have given to Vista still more performing search and indexing features, but Microsoft for some reason decided to use a more traditional technology, and the result is still amazing. I believe WinFS will probably be there in Windows Vienna, may be as soon as end 2009. Don't expect it in a service pack for Vista! A service pack can't obviously transform the file system of an OS. Don't be too sad though, NTFS is still fantastic!

here is a good wiki article about WinFS