Vista SP1 offers no features, focuses on tweaks, security
Windows Vista Service Pack 1 (SP1), just delivered to a group of approximately 12,000 beta testers, offers no dramatic interface changes, nor does it add new features to the operating system. Instead SP1 focuses on improving performance, reliability and application compatibility, and it extends support to emerging hardware such as the exFAT file system that will be used by flash memory storage and consumer devices. However, SP1 does change the way Windows search works, allowing third-party programs such as Google Desktop Search to integrate more easily into the operating system.