Now that Windows has announced it will be releasing Windows 8, which will run on a Tablet,
I want to develop apps now that will port to Windows 8, and run on a Windows tablet.

As Windows 8 is not out yet, I will have to develop for windows 7 now, but the eventual goal is to run apps
locally on a Windows tablet (Without Internet connectivity all the time)

Any ideas on which of the following technologies I should use now ?
Windows Forms
Web Forms
Silverlight
WPF
A.N. Other ?

TIA
Gerard