I stand corrected. OSX will preview MS Office Word Mac files. Thanks to Mike for that!
Another nice new feature of Windows 7 which you may not have notice before. Similar to a feature in OSX, this enables you to preview a file without opening it, straight in Explorer.
On the left, I am previewing a Word Document. The same goes for any native windows/Microsoft format. On the right is me attempting to preview an Open Office document in Finder, but failing. It will only preview Quicktime and Image files.
Only difference is, in 7 it’s way better.