According to various sources and tech news sites, the first service pack for Windows Vista will be available at the end of this year 2007. This service pack will address any major bugs, issues, and compatibility problems along with fit and finish in how the OS functions. Likely what will happen is that SP1 will clear up any bones of contention with people who refuse to upgrade until the bugs are worked out. There is also speculation that the service pack will include an ability to implement WinFS on top of NTFS. Therefore, it won’t be a file system based on WinFS but it might give us some abilities like virtual folders etc.
Source: OSNews