Microsoft Reveals Windows Vista Versions
The BBC has a story on the next major release of Microsoft Windows, Windows Vista or just Vista, which is expected by the end of the year. Microsoft has broken it out into six versions – three targeted towards home (including one that can has PVR functionality), two for business/corporate useage, and one for “emerging markets”.
So it looks like there won’t be a dedicated Tablet PC version, rather you will use one (or more) of the other versions, probably one of the home and one of the corporate versions has the functionality, to install/run on a Tablet PC. It could be that the functionality is built-in all versions of Vista.