Windows 8 Blog is alive with UNCONFIRMED information. It seem that in general. the classic start menu has gone,
Only Windows 7 Versions ( excluding Ultimate ) will be able to Upgrade Fully to Win 8.
Win Xp ony the User setting will be transfered, And Vista Files and settings but not applications.
Some versions of Win 8 May not have WMP,
For my use it looks like a No Go.But wait and see
There is a Renamed Server Version " Windows Server 2012 " a beta is available for download