I guess MS hasn’t given up on Vista just yet… http://windowsvistablog.com/blogs/windowsvista/archive/2008/10/24/windows-vista-service-pack-2-beta.aspx there is no time frame yet but several features are discussed.
• Windows Vista SP2 adds Windows Search 4.0 for faster and improved relevancy in searches.
• Windows Vista SP2 contains the Bluetooth 2.1 Feature Pack supporting the most recent specification for Bluetooth Technology.
• Ability to record data on to Blu-Ray media natively in Windows Vista.
• Adds Windows Connect Now (WCN) to simplify Wi-Fi Configuration.
• Windows Vista SP2 enables the exFAT file system to support UTC timestamps, which allows correct file synchronization across time zones.