Windows Vista R2 "Fiji"-The UI will be updated with things that were originally promised for Vista, along with a more powerful sidebar, which will be more than just a dock for widgets (a.k.a. gadgets)
-.Net Framework will be updated to 3.5 (or maybe even 4)
-WinFS will be applied over NTFS to give us Virtual Folders (or maybe just Saved Searches)
-All bundled application will be updated to newer versions
-Tighter integration with Windows Live. Probably through 'Codename Nemo', a media center application thats integrated with Messenger, Spaces, and probably lots of other Windows Live Services.
- We might see Monaco, a music authoring tool, similar to Apple's Garageband.
- Default playback of HD-DVD (maybe even Blu-ray), Vista currently identifies these disks but cannot play them without an external decoder.
-A more advanced Speech Recognition
-NGSCB will be implemented to make the system more secure.
-New themes, icons, wallpapers, games, and minor tweaks to almost everything.
Windows Vienna-The current interface will be completely stripped, no more explorer shells, and taskbars. No start menu. Probably no toolbars, or menus (which already started with Vista).
-Speech Recognition will become a major input device (though it may not replace the keyboard and mouse) and will be supported by most third party applications
-Many projects from Microsoft's R&D will come into play, especially from their VIBE research center. A pie-menu is rumored to be used.
-WinFS (or its sucessor) will replace NTFS. No more drives, or files/folders location to worry about. File Management will be done through applications, which will automaticlly index and sort the files they support.
-Even bundled applications will evolve a lot (compare WMP6 with WMP11).
-Search will part a huge part in Vienna, (even in Vista Search can be used to find a file/application without browsing for it)
-Applications with non-managed code will run in a sandbox mode (like IE7 does in Vista), so that security exploits in a single application doesn't affect the entire OS.
Source:
http://jameskyton.wordpress.com/2006/12/29...iji-and-vienna/