A new feature in Windows Vista will allow you to pull back files from the dead.
'Previous Versions' will be automatically set up to keep a version history of files - whether they're modified or deleted. A version browser integrated into the Properties page of the file will allow you to revert back to previous stages of the file, and a browser for the Recycle Bin will allow you to pull it out from the depths of deletion.
Some people have expressed concerns about the privacy implications of the feature, which could be used to allow authorities access to deleted files on personal machines. However, the feature could always be turned off.
Network administrators could use the system to keep previous versions of files on a network drive somewhere, allowing users to recover from their inevitable screw-ups.
The system will no doubt take a fair chunk of hard disk capacity, but with most people barely touching the limits of the capacious drives in modern machines, this shouldn't really be a problem.
Surfing for porn on a shared computer just got a whole lot harder. Let us know your thoughts in the forums.