How easy is it to port a Windows Phone 7 application to Metro on a Windows 8 tablet?

Question

I know that Metro on both platforms shares a common “look and feel” and that WinRt makes use of XAMLand C# (or VB.NET) like Silverlight does on Windows Phone 7.

Howev

Answer 1

Looking at the APIs, and ignoring differences in user experience, I'd say: not difficult but not trivial. Or, another way, more difficult than going from WPF to Silverlight but less difficult than WinForms to WPF.

• Most of the WP/Silverlight controls (minus pivot/panorama) exist, but they exist a different namespace
• Other features, like inter-application communication and state management, appear to work completely differently.