It's actually refreshing to hear the word Longhorn again. With WinFS, I don't know, NTFS works just fine it seems; and how important are file systems nowadays for client OSes?
I agree that FS is not the most important thing for a client OS. While, it's 1 of the most important elements for a good OS. Geeks have the right to pursue best technologies, right?
Frankly speaking, I am not very happy with the performance of NTFS.