XAML apps using C++/CX for Desktop Windows
Both Silverlight and WPF use XAML along with code-behind to implement apps. Neither are still maintained but if you want to play with the same technology, it's there.
As Jeff McClintock mentioned, Microsoft has announced that a future update to Windows 8 will allow apps to run on the desktop, but I expect that this will merely be a windowing change and the apps will still run in the restricted sandbox that Store Apps run within. Maybe Microsoft will introduce yet another desktop-based UI framework and support it for three years before killing it.
WTL is newer than MFC, although its last update was six years ago. I personally recommend Qt, as it allows access to native Win32 calls (so you can do whatever ganky stuff Win32 apps normally want to do) while still having a rich, robust UI framework to build upon.
A future update to Windows 8.1 will allow Windows 8 Store Apps to run in a Window on the Desktop, and appear on the taskbar like a Win32 Application. This allows Store apps to Act a lot like Desktop Apps. MS have hinted store-app XMAL will be available to Desktop apps at some point in future.
