A step in the right direction. Support for RTF and other doc formats would be great, not to mention Photoshop files. Even better if the preview could be done in an optional pane right in the Nautilus window rather than having to hit the spacebar for each file.
Glad to know it comes by default in Mint. But still one has to discover about the magic touch to activate this useful & simple tool to view content without opening files: [select]+tab=fast view [Libreffice formats will only show you a fast view of Proprieties in Mint 12]