Microsoft Vista provides Freeze Dry technology

Microsoft Vista will include a technology called Freeze Dry:

Many IT managers plan to automatically install patches and updates on machines during periods when they are inactive, such as overnight or on weekends. However, as some patches require machines to reboot, users who leave documents open and unsaved run the risk of losing that data if the machine is automatically updated.

Freeze Dry eliminates that problem by automatically saving application state and documents and then restoring them once the system restarts, Stephan said.

Nice idea but I’m not certain this will be a saving point for Vista at this point.
WinBeta < ZDnet.au