Create Full Migration tool to go from WinForms to WPF
WPF should be a superset of WinForms. If not, small enhancements could be made to make this so. This would allow to convert all code from WinForms to WPF with 100% fidelity. This was the huge mistake Microsoft made when they moved to VB.Net from VB6 because they let a 3rd party design the migration, who happened to sell migration services. If they did this right, MS could lower their costs because they would only need to support WPF. This should be a no brainer to help all of the Enterprise developers which are a huge source of the MSDN licenses.
WPF is totally different... so it won't be possible to do it that way. Neverthless, it might be possible to have a wizard that would be able to at least create XAML.
Being able to hook commonly used events (code behind) when using standard controls would be a nice addition as it might then being possible to automatically convert many simple forms.