Microsoft simply can't throw out their native program base. When .NET was released, they promoted the idea that it was going to be the Windows API in the long r

Microsoft simply can't throw out their native program base. When .NET was released, they promoted the idea that it was going to be the Windows API in the long run. But most commercial applications (including Microsoft's) are still written for the native API. While .NET was a success for custom applications. I expect pretty much the same from Metro. It will be adopted for certain uses: small and touch devices. For the rest I doubt it'll get in the way. I believe Microsoft is trying to atrract developers to the new interface, but "native Windows" is there to stay.