Microsoft planning Windows 8 with 3D UI, says source
...But it'll probably only be on the top spec Windows packages
A source close to Microsoft has lifted the lid on some Windows 8 features, despite Windows 7 only being a year into its lifespan. The source has told Italian website Windows 8 Italia that the current ‘Aero’ UI on Windows will be dropped in favour of ‘Wind’.
The Wind interface will be fully 3D and completely customisable, although there’s not much detail beyond that. What we do know is that a 3D OS will likely be a train on lesser machines.